Make CI status in dashboard behind a feature flag

This is so that we can test this and hide the pipeline
status to eliminate Gitaly N+1s and improve performance
for this page

app/views/dashboard/projects/_projects.html.haml

-= render 'shared/projects/list', projects: @projects, ci: true, user: current_user
+= render 'shared/projects/list', projects: @projects, pipeline_status: Feature.enabled?(:dashboard_pipeline_status, default_enabled: true), user: current_user

app/views/explore/projects/_projects.html.haml

 - is_explore_page = defined?(explore_page) && explore_page
-= render 'shared/projects/list', projects: projects, user: current_user, explore_page: is_explore_page
+= render 'shared/projects/list', projects: projects, user: current_user, explore_page: is_explore_page, pipeline_status: Feature.enabled?(:dashboard_pipeline_status, default_enabled: true)

app/views/shared/projects/_list.html.haml

@@ -6,7 +6,6 @@
 - merge_requests = true unless local_assigns[:merge_requests] == false
 - issues = true unless local_assigns[:issues] == false
 - pipeline_status = true unless local_assigns[:pipeline_status] == false
-- ci = false unless local_assigns[:ci] == true
 - skip_namespace = false unless local_assigns[:skip_namespace] == true
 - user = local_assigns[:user]
 - show_last_commit_as_description = false unless local_assigns[:show_last_commit_as_description] == true
@@ -40,7 +39,7 @@
       - projects.each_with_index do |project, i|
         - css_class = (i >= projects_limit) || project.pending_delete? ? 'hide' : nil
         = render "shared/projects/project", project: project, skip_namespace: skip_namespace,
-          avatar: avatar, stars: stars, css_class: css_class, ci: ci, use_creator_avatar: use_creator_avatar,
+          avatar: avatar, stars: stars, css_class: css_class, use_creator_avatar: use_creator_avatar,
           forks: forks, show_last_commit_as_description: show_last_commit_as_description, user: user, merge_requests: merge_requests,
           issues: issues, pipeline_status: pipeline_status, compact_mode: compact_mode
     = paginate_collection(projects, remote: remote) unless skip_pagination

spec/features/dashboard/projects_spec.rb

@@ -173,6 +173,19 @@ describe 'Dashboard Projects' do
       end
     end
 
+    shared_examples 'hidden pipeline status' do
+      it 'does not show the pipeline status' do
+        visit dashboard_projects_path
+
+        page.within('.controls') do
+          expect(page).not_to have_xpath("//a[@href='#{pipelines_project_commit_path(project, project.commit, ref: pipeline.ref)}']")
+          expect(page).not_to have_css('.ci-status-link')
+          expect(page).not_to have_css('.ci-status-icon-success')
+          expect(page).not_to have_link('Pipeline: passed')
+        end
+      end
+    end
+
     context 'guest user of project and project has private pipelines' do
       let(:guest_user) { create(:user) }
 
@@ -182,16 +195,15 @@ describe 'Dashboard Projects' do
         sign_in(guest_user)
       end
 
-      it 'shows that the last pipeline passed' do
-        visit dashboard_projects_path
+      it_behaves_like 'hidden pipeline status'
+    end
 
-        page.within('.controls') do
-          expect(page).not_to have_xpath("//a[@href='#{pipelines_project_commit_path(project, project.commit, ref: pipeline.ref)}']")
-          expect(page).not_to have_css('.ci-status-link')
-          expect(page).not_to have_css('.ci-status-icon-success')
-          expect(page).not_to have_link('Pipeline: passed')
-        end
+    context 'when dashboard_pipeline_status is disabled' do
+      before do
+        stub_feature_flags(dashboard_pipeline_status: false)
       end
+
+      it_behaves_like 'hidden pipeline status'
     end
   end