Renders feature flags link when ci/cd is disabled

Updates specs

try to fix test

app/views/layouts/nav/sidebar/_project.html.haml

@@ -195,8 +195,13 @@
                     = _('Charts')
 
       - if project_nav_tab? :operations
+        - if can?(current_user, :read_environment, @project) || can?(current_user, :read_cluster, @project) 
+          - main_link = metrics_project_environments_path(@project)
+        - elsif can?(current_user, :read_feature_flag, @project)
+          - main_link = project_feature_flags_path(@project)
+
         = nav_link(controller: sidebar_operations_paths) do
-          = link_to metrics_project_environments_path(@project), class: 'shortcuts-operations' do
+          = link_to main_link, class: 'shortcuts-operations' do
             .nav-icon-container
               = sprite_icon('cloud-gear')
             %span.nav-item-name

ee/changelogs/unreleased/8400-operations-check.yml

+---
+title: Defaults to feature flags link for Operations entry
+merge_request: 8622
+author:
+type: fixed

ee/spec/views/layouts/nav/sidebar/_project.html.haml_spec.rb

@@ -13,6 +13,33 @@ describe 'layouts/nav/sidebar/_project' do
     stub_licensed_features(tracing: true)
   end
 
+  describe 'Operations main link' do
+    describe 'when ci/cd is disabled' do
+      let(:feature) { ProjectFeature::DISABLED }
+
+      it 'links to feature flags page' do
+        allow(view).to receive(:can?).with(:read_environment).and_return(false)
+        allow(view).to receive(:can?).with(:read_cluster).and_return(false)
+        allow(view).to receive(:can?).with(:read_feature_flag).and_return(true)
+        render
+
+        expect(rendered).to have_link('Operations', :href=> project_feature_flags_path(project))
+      end
+    end
+
+    describe 'when ci/cd is enabled' do
+      let(:feature) { ProjectFeature::ENABLED }
+
+      it 'links to metrics page' do 
+        allow(view).to receive(:can?).and_return(true)
+
+        render
+
+        expect(rendered).to have_link('Operations', :href=> metrics_project_environments_path(project))        
+      end
+    end
+  end
+
   describe 'Operations > Tracing' do
     it 'is not visible when no valid license' do
       allow(view).to receive(:can?).and_return(true)