Merge branch 'mc/backstage/remove-beta-check-project-subs' into 'master'

Remove beta check for project subscriptions

See merge request gitlab-org/gitlab!44601

ee/app/models/ee/ci/pipeline.rb

@@ -181,7 +181,7 @@ module EE
       end
 
       def project_has_subscriptions?
-        project.beta_feature_available?(:ci_project_subscriptions) &&
+        project.feature_available?(:ci_project_subscriptions) &&
           project.downstream_projects.any?
       end