Removes duplicated cluster show partials

gcp/show and user/show partial contain basically the same html elements
causing duplication.

The difference between the partials is that one of them has
html elements disabled if the cluster is managed. This MR aims to
remove that duplication by having just a single
show partial for both types

app/views/clusters/clusters/gcp/_show.html.haml

-.form-group
-  %label.append-bottom-10{ for: 'cluster-name' }
-    = s_('ClusterIntegration|Kubernetes cluster name')
-  .input-group
-    %input.form-control.cluster-name.js-select-on-focus{ value: @cluster.name, readonly: true }
-    %span.input-group-append
-      = clipboard_button(text: @cluster.name, title: s_('ClusterIntegration|Copy Kubernetes cluster name'), class: 'input-group-text btn-default')
-
-= form_for @cluster, url: clusterable.cluster_path(@cluster), as: :cluster do |field|
-  = form_errors(@cluster)
-
-  = field.fields_for :platform_kubernetes, @cluster.platform_kubernetes do |platform_kubernetes_field|
-    .form-group
-      = platform_kubernetes_field.label :api_url, s_('ClusterIntegration|API URL')
-      .input-group
-        = platform_kubernetes_field.text_field :api_url, class: 'form-control js-select-on-focus', placeholder: s_('ClusterIntegration|API URL'), readonly: true
-        %span.input-group-append
-          = clipboard_button(text: @cluster.platform_kubernetes.api_url, title: s_('ClusterIntegration|Copy API URL'), class: 'input-group-text btn-default')
-
-    .form-group
-      = platform_kubernetes_field.label :ca_cert, s_('ClusterIntegration|CA Certificate')
-      .input-group
-        = platform_kubernetes_field.text_area :ca_cert, class: 'form-control js-select-on-focus', placeholder: s_('ClusterIntegration|Certificate Authority bundle (PEM format)'), readonly: true
-        %span.input-group-append.clipboard-addon
-          = clipboard_button(text: @cluster.platform_kubernetes.ca_cert, title: s_('ClusterIntegration|Copy CA Certificate'), class: 'input-group-text btn-blank')
-
-    .form-group
-      = platform_kubernetes_field.label :token, s_('ClusterIntegration|Token')
-      .input-group
-        = platform_kubernetes_field.text_field :token, class: 'form-control js-cluster-token js-select-on-focus', type: 'password', placeholder: s_('ClusterIntegration|Token'), readonly: true
-        %span.input-group-append
-          %button.btn.btn-default.input-group-text.js-show-cluster-token{ type: 'button' }
-            = s_('ClusterIntegration|Show')
-          = clipboard_button(text: @cluster.platform_kubernetes.token, title: s_('ClusterIntegration|Copy Token'), class: 'btn-default')
-
-    - if @cluster.allow_user_defined_namespace?
-      .form-group
-        = platform_kubernetes_field.label :namespace, s_('ClusterIntegration|Project namespace (optional, unique)')
-        = platform_kubernetes_field.text_field :namespace, class: 'form-control', placeholder: s_('ClusterIntegration|Project namespace')
-
-    .form-group
-      .form-check
-        = platform_kubernetes_field.check_box :authorization_type, { class: 'form-check-input', disabled: true }, 'rbac', 'abac'
-        = platform_kubernetes_field.label :authorization_type, s_('ClusterIntegration|RBAC-enabled cluster'), class: 'form-check-label label-bold'
-        .form-text.text-muted
-          = s_('ClusterIntegration|Enable this setting if using role-based access control (RBAC).')
-          = s_('ClusterIntegration|This option will allow you to install applications on RBAC clusters.')
-
-    .form-group
-      = field.submit s_('ClusterIntegration|Save changes'), class: 'btn btn-success'

app/views/clusters/clusters/show.html.haml

@@ -31,7 +31,7 @@
   %section#cluster-integration
     %h4= @cluster.name
     = render 'banner'
-    = render 'integration_form'
+    = render 'form'
 
   .cluster-applications-table#js-cluster-applications
 
@@ -42,10 +42,7 @@
         = expanded ? 'Collapse' : 'Expand'
       %p= s_('ClusterIntegration|See and edit the details for your Kubernetes cluster')
     .settings-content
-      - if @cluster.managed?
-        = render 'clusters/clusters/gcp/show'
-      - else
-        = render 'clusters/clusters/user/show'
+      = render 'clusters/platforms/kubernetes/form', cluster: @cluster, platform: @cluster.platform_kubernetes, update_cluster_url_path: clusterable.cluster_path(@cluster)
 
   %section.settings.no-animate#js-cluster-advanced-settings{ class: ('expanded' if expanded) }
     .settings-header

app/views/clusters/clusters/user/_show.html.haml

-= form_for @cluster, url: clusterable.cluster_path(@cluster), as: :cluster do |field|
-  = form_errors(@cluster)
-  .form-group
-    = field.label :name, s_('ClusterIntegration|Kubernetes cluster name'), class: 'label-bold'
-    = field.text_field :name, class: 'form-control', placeholder: s_('ClusterIntegration|Kubernetes cluster name')
-
-  = field.fields_for :platform_kubernetes, @cluster.platform_kubernetes do |platform_kubernetes_field|
-    .form-group
-      = platform_kubernetes_field.label :api_url, s_('ClusterIntegration|API URL'), class: 'label-bold'
-      = platform_kubernetes_field.text_field :api_url, class: 'form-control', placeholder: s_('ClusterIntegration|API URL')
-
-    .form-group
-      = platform_kubernetes_field.label :ca_cert, s_('ClusterIntegration|CA Certificate'), class: 'label-bold'
-      = platform_kubernetes_field.text_area :ca_cert, class: 'form-control', placeholder: s_('ClusterIntegration|Certificate Authority bundle (PEM format)')
-
-    .form-group
-      = platform_kubernetes_field.label :token, s_('ClusterIntegration|Token'), class: 'label-bold'
-      .input-group
-        = platform_kubernetes_field.text_field :token, class: 'form-control js-cluster-token', type: 'password', placeholder: s_('ClusterIntegration|Token'), autocomplete: 'off'
-        %span.input-group-append.clipboard-addon
-          .input-group-text
-            %button.js-show-cluster-token.btn-blank{ type: 'button' }
-              = s_('ClusterIntegration|Show')
-
-    - if @cluster.allow_user_defined_namespace?
-      .form-group
-        = platform_kubernetes_field.label :namespace, s_('ClusterIntegration|Project namespace (optional, unique)'), class: 'label-bold'
-        = platform_kubernetes_field.text_field :namespace, class: 'form-control', placeholder: s_('ClusterIntegration|Project namespace')
-
-    .form-group
-      .form-check
-        = platform_kubernetes_field.check_box :authorization_type, { class: 'form-check-input', disabled: true }, 'rbac', 'abac'
-        = platform_kubernetes_field.label :authorization_type, s_('ClusterIntegration|RBAC-enabled cluster'), class: 'form-check-label label-bold'
-        .form-text.text-muted
-          = s_('ClusterIntegration|Enable this setting if using role-based access control (RBAC).')
-          = s_('ClusterIntegration|This option will allow you to install applications on RBAC clusters.')
-
-    .form-group
-      = field.submit s_('ClusterIntegration|Save changes'), class: 'btn btn-success'

app/views/clusters/platforms/kubernetes/_form.html.haml

+= form_for cluster, url: update_cluster_url_path, as: :cluster do |field|
+  = form_errors(cluster)
+
+  .form-group
+    - if cluster.managed?
+      %label.append-bottom-10{ for: 'cluster-name' }
+        = s_('ClusterIntegration|Kubernetes cluster name')
+      .input-group
+        %input.form-control.cluster-name.js-select-on-focus{ value: cluster.name, readonly: true }
+        %span.input-group-append
+          = clipboard_button(text: cluster.name, title: s_('ClusterIntegration|Copy Kubernetes cluster name'), class: 'input-group-text btn-default')
+    - else
+      = field.label :name, s_('ClusterIntegration|Kubernetes cluster name'), class: 'label-bold'
+      .input-group
+        = field.text_field :name, class: 'form-control', placeholder: s_('ClusterIntegration|Kubernetes cluster name')
+
+  = field.fields_for :platform_kubernetes, platform do |platform_field|
+    .form-group
+      = platform_field.label :api_url, s_('ClusterIntegration|API URL')
+      .input-group
+        = platform_field.text_field :api_url, class: 'form-control js-select-on-focus', placeholder: s_('ClusterIntegration|API URL'), readonly: cluster.managed?
+        - if cluster.managed?
+          %span.input-group-append
+            = clipboard_button(text: platform.api_url, title: s_('ClusterIntegration|Copy API URL'), class: 'input-group-text btn-default')
+
+    .form-group
+      = platform_field.label :ca_cert, s_('ClusterIntegration|CA Certificate')
+      .input-group
+        = platform_field.text_area :ca_cert, class: 'form-control js-select-on-focus', placeholder: s_('ClusterIntegration|Certificate Authority bundle (PEM format)'), readonly: cluster.managed?
+        - if cluster.managed?
+          %span.input-group-append.clipboard-addon
+            = clipboard_button(text: platform.ca_cert, title: s_('ClusterIntegration|Copy CA Certificate'), class: 'input-group-text btn-blank')
+
+    .form-group
+      = platform_field.label :token, s_('ClusterIntegration|Token')
+      .input-group
+        = platform_field.text_field :token, class: 'form-control js-cluster-token js-select-on-focus', type: 'password', placeholder: s_('ClusterIntegration|Token'), readonly: cluster.managed?
+        %span.input-group-append
+          %button.btn.btn-default.input-group-text.js-show-cluster-token{ type: 'button' }
+            = s_('ClusterIntegration|Show')
+          - if cluster.managed?
+            = clipboard_button(text: platform.token, title: s_('ClusterIntegration|Copy Token'), class: 'btn-default')
+
+    - if cluster.allow_user_defined_namespace?
+      .form-group
+        = platform_field.label :namespace, s_('ClusterIntegration|Project namespace (optional, unique)')
+        = platform_field.text_field :namespace, class: 'form-control', placeholder: s_('ClusterIntegration|Project namespace')
+
+    .form-group
+      .form-check
+        = platform_field.check_box :authorization_type, { class: 'form-check-input', disabled: true }, 'rbac', 'abac'
+        = platform_field.label :authorization_type, s_('ClusterIntegration|RBAC-enabled cluster'), class: 'form-check-label label-bold'
+        .form-text.text-muted
+          = s_('ClusterIntegration|Enable this setting if using role-based access control (RBAC).')
+          = s_('ClusterIntegration|This option will allow you to install applications on RBAC clusters.')
+
+  .form-group
+    = field.submit s_('ClusterIntegration|Save changes'), class: 'btn btn-success'