Resolve CE/EE diffs in _clone_panel

Part of single codebase changes.

app/views/shared/_clone_panel.html.haml

@@ -16,14 +16,12 @@
           = ssh_clone_button(project)
         %li
           = http_clone_button(project)
-        - if alternative_kerberos_url?
-          %li
-            = kerberos_clone_button(project)
+        = render_if_exists 'shared/kerberos_clone_button', project: project
 
   = text_field_tag :project_clone, default_url_to_repo(project), class: "js-select-on-focus form-control", readonly: true, aria: { label: 'Project clone URL' }
   .input-group-append
     = clipboard_button(target: '#project_clone', title: _("Copy URL to clipboard"), class: "input-group-text btn-default btn-clipboard")
 
-    = geo_button(modal_target: '#modal-geo-info') if Gitlab::Geo.secondary?
+    = render_if_exists 'shared/geo_modal_button'
 
-= render 'shared/geo_info_modal', project: project if Gitlab::Geo.secondary?
+= render_if_exists 'shared/geo_modal', project: project

ee/app/views/shared/_geo_modal.html.haml

+= render 'shared/geo_info_modal', project: project if Gitlab::Geo.secondary?

ee/app/views/shared/_geo_modal_button.html.haml

+= geo_button(modal_target: '#modal-geo-info') if Gitlab::Geo.secondary?

ee/app/views/shared/_kerberos_clone_button.html.haml

+- if alternative_kerberos_url?
+  %li
+    = kerberos_clone_button(project)