Show promotions on CA page

This change will show the Contribution Analytics promotion page for
users who has no permission to see the selected group's Contribution
Analytics page.

changelogs/unreleased/229076-fix-access-denied-on-ca.yml

+---
+title: Show the Contribution Analytics promotion page for users without permission
+merge_request: 57222
+author:
+type: changed

ee/app/controllers/groups/contribution_analytics_controller.rb

@@ -40,7 +40,7 @@ class Groups::ContributionAnalyticsController < Groups::ApplicationController
   end
 
   def authorize_read_contribution_analytics!
-    render_403 unless user_has_access_to_feature?
+    render_promotion unless user_has_access_to_feature?
   end
 
   def render_promotion

ee/spec/controllers/groups/contribution_analytics_controller_spec.rb

@@ -3,14 +3,15 @@
 require 'spec_helper'
 
 RSpec.describe Groups::ContributionAnalyticsController do
-  let(:user) { create(:user) }
-  let(:user2) { create(:user) }
-  let(:user3) { create(:user) }
-  let(:guest_user) { create(:user) }
-  let(:group) { create(:group) }
-  let(:project) { create(:project, :repository, group: group) }
-  let(:issue) { create(:issue, project: project) }
-  let(:merge_request) { create(:merge_request, :simple, source_project: project) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:user2) { create(:user) }
+  let_it_be(:user3) { create(:user) }
+  let_it_be(:guest_user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:project) { create(:project, :repository, group: group) }
+  let_it_be(:issue) { create(:issue, project: project) }
+  let_it_be(:merge_request) { create(:merge_request, :simple, source_project: project) }
+
   let(:push_data) { Gitlab::DataBuilder::Push.build_sample(project, user) }
 
   def create_event(author, project, target, action)
@@ -71,7 +72,8 @@ RSpec.describe Groups::ContributionAnalyticsController do
           it 'renders 403' do
             request
 
-            expect(response).to have_gitlab_http_status(:forbidden)
+            expect(response).to render_template(
+              'shared/promotions/_promote_contribution_analytics')
           end
         end
       end