Change group policy for Group Activity Analytics

Only allow users who have access to the group, to
be able to access the analytics

ee/app/policies/ee/group_policy.rb

@@ -87,7 +87,7 @@ module EE
       rule { has_access & contribution_analytics_available }
         .enable :read_group_contribution_analytics
 
-      rule { can?(:read_group) & group_activity_analytics_available }
+      rule { has_access & group_activity_analytics_available }
         .enable :read_group_activity_analytics
 
       rule { reporter & cycle_analytics_available }.policy do

ee/spec/features/analytics/group_analytics_spec.rb

@@ -10,6 +10,7 @@ describe 'GroupAnalytics' do
   before do
     stub_licensed_features(group_activity_analytics: true)
 
+    group.add_developer(user)
     sign_in(user)
   end
 

ee/spec/requests/api/analytics/group_activity_analytics_spec.rb

@@ -48,7 +48,7 @@ describe API::Analytics::GroupActivityAnalytics do
       end
     end
 
-    context 'when user has no authorization to view a private group' do
+    context 'when user does not have access to a group' do
       let(:current_user) { anonymous_user }
 
       it 'is returns `not_found`' do