Merge branch 'mc/backstage/stub-license-project-subs-specs' into 'master'

Stub feature instead of feature flag for project subscription in specs

See merge request gitlab-org/gitlab!44192

ee/spec/models/ci/pipeline_spec.rb

@@ -377,7 +377,7 @@ RSpec.describe Ci::Pipeline do
 
         context 'when feature is not available' do
           before do
-            stub_feature_flags(ci_project_subscriptions: false)
+            stub_licensed_features(ci_project_subscriptions: false)
           end
 
           it 'does not schedule the trigger downstream subscriptions worker' do