FE for share groups with groups

What does this MR do?

#22986 (closed)

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• [-] Separation of EE specific content

Performance and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

app/models/project_group_link.rb

@@ -21,6 +21,8 @@ class ProjectGroupLink < ApplicationRecord
 
   after_commit :refresh_group_members_authorized_projects
 
+  alias_method :shared_with_group, :group
+
   def self.access_options
     Gitlab::Access.options
   end
@@ -33,10 +35,6 @@ def human_access
     self.class.access_options.key(self.group_access)
   end
 
-  def shared_with_group
-    self.group
-  end
-
   private
 
   def different_group