Reverse view override as EE has an override too

Use presenters instead otherwise we will have x2 overides in EE

app/presenters/clusterable_presenter.rb

@@ -48,6 +48,10 @@ class ClusterablePresenter < Gitlab::View::Presenter::Delegated
     nil
   end
 
+  def sidebar_text
+    raise NotImplementedError
+  end
+
   def learn_more_link
     raise NotImplementedError
   end

app/presenters/group_clusterable_presenter.rb

@@ -24,6 +24,11 @@ class GroupClusterablePresenter < ClusterablePresenter
     s_('ClusterIntegration|Adding an integration to your group will share the cluster across all your projects.')
   end
 
+  override :sidebar_text
+  def sidebar_text
+    s_('ClusterIntegration|Adding a Kubernetes cluster to your group will automatically share the cluster across all your projects. Use review apps, deploy your applications, and easily run your pipelines for all projects using the same cluster.')
+  end
+
   override :learn_more_link
   def learn_more_link
     link_to(s_('ClusterIntegration|Learn more about group Kubernetes clusters'), help_page_path('user/project/clusters/index'), target: '_blank', rel: 'noopener noreferrer')

app/presenters/project_clusterable_presenter.rb

@@ -19,6 +19,11 @@ class ProjectClusterablePresenter < ClusterablePresenter
     project_cluster_path(clusterable, cluster, params)
   end
 
+  override :sidebar_text
+  def sidebar_text
+    s_('ClusterIntegration|With a Kubernetes cluster associated to this project, you can use review apps, deploy your applications, run your pipelines, and much more in an easy way.')
+  end
+
   override :learn_more_link
   def learn_more_link
     link_to(s_('ClusterIntegration|Learn more about Kubernetes'), help_page_path('user/project/clusters/index'), target: '_blank', rel: 'noopener noreferrer')

app/views/clusters/clusters/_sidebar.html.haml

+%h4.prepend-top-0
+  = s_('ClusterIntegration|Add a Kubernetes cluster integration')
+%p
+  = clusterable.sidebar_text
+%p
+  = clusterable.learn_more_link

app/views/groups/clusters/_sidebar.html.haml

-%h4.prepend-top-0
-  = s_('ClusterIntegration|Add a Kubernetes cluster integration')
-%p
-  = s_('ClusterIntegration|Adding a Kubernetes cluster to your group will automatically share the cluster across all your projects.')
-  = s_('ClusterIntegration|Use review apps, deploy your applications, and easily run your pipelines for all projects using the same cluster.')

app/views/projects/clusters/_sidebar.html.haml

-- clusters_help_url = help_page_path('user/project/clusters/index.md')
-- help_link_start = "<a href=\"%{url}\" target=\"_blank\" rel=\"noopener noreferrer\">".html_safe
-- help_link_end = '</a>'.html_safe
-%h4.prepend-top-0
-  = s_('ClusterIntegration|Add a Kubernetes cluster integration')
-%p
-  = s_('ClusterIntegration|With a Kubernetes cluster associated to this project, you can use review apps, deploy your applications, run your pipelines, and much more in an easy way.')
-%p
-  = s_('ClusterIntegration|Learn more about %{help_link_start}Kubernetes%{help_link_end}.').html_safe % { help_link_start: help_link_start % { url: clusters_help_url }, help_link_end: help_link_end }

locale/gitlab.pot

@@ -1367,7 +1367,7 @@ msgstr ""
 msgid "ClusterIntegration|Add a Kubernetes cluster integration"
 msgstr ""
 
-msgid "ClusterIntegration|Adding a Kubernetes cluster to your group will automatically share the cluster across all your projects."
+msgid "ClusterIntegration|Adding a Kubernetes cluster to your group will automatically share the cluster across all your projects. Use review apps, deploy your applications, and easily run your pipelines for all projects using the same cluster."
 msgstr ""
 
 msgid "ClusterIntegration|Adding an integration to your group will share the cluster across all your projects."
@@ -1550,9 +1550,6 @@ msgstr ""
 msgid "ClusterIntegration|Learn more about %{help_link_start_machine_type}machine types%{help_link_end} and %{help_link_start_pricing}pricing%{help_link_end}."
 msgstr ""
 
-msgid "ClusterIntegration|Learn more about %{help_link_start}Kubernetes%{help_link_end}."
-msgstr ""
-
 msgid "ClusterIntegration|Learn more about %{help_link_start}zones%{help_link_end}."
 msgstr ""
 
@@ -1703,9 +1700,6 @@ msgstr ""
 msgid "ClusterIntegration|Token"
 msgstr ""
 
-msgid "ClusterIntegration|Use review apps, deploy your applications, and easily run your pipelines for all projects using the same cluster."
-msgstr ""
-
 msgid "ClusterIntegration|Validating project billing status"
 msgstr ""