Add additional feature check for Group Activity

This is for when the feature flag is not set.

ee/app/helpers/ee/groups_helper.rb

@@ -78,6 +78,7 @@ module EE
     end
 
     def show_group_activity_analytics?
+      ::Feature.enabled?(:group_activity_analytics, @group) &&
         can?(current_user, :read_group_activity_analytics, @group)
     end
 

qa/qa/specs/features/ee/browser_ui/1_manage/group/group_saml_non_enforced_sso_spec.rb

 # frozen_string_literal: true
 
 module QA
-  context 'Manage', :group_saml, :orchestrated, :requires_admin, quarantine: { issue: 'https://gitlab.com/gitlab-org/gitlab/-/issues/212378', type: :bug } do
+  context 'Manage', :group_saml, :orchestrated, :requires_admin do
     describe 'Group SAML SSO - Non enforced SSO' do
       include Support::Api