Move EE commit status enums to FOSS

to follow recommendation from `doc/development/creating_enums.md`.

app/models/commit_status_enums.rb

@@ -19,13 +19,14 @@ module CommitStatusEnums
       scheduler_failure: 11,
       data_integrity_failure: 12,
       forward_deployment_failure: 13,
+      protected_environment_failure: 1_000,
       insufficient_bridge_permissions: 1_001,
       downstream_bridge_project_not_found: 1_002,
       invalid_bridge_trigger: 1_003,
+      upstream_bridge_project_not_found: 1_004,
+      insufficient_upstream_permissions: 1_005,
       bridge_pipeline_is_child_pipeline: 1_006,
       downstream_pipeline_creation_failed: 1_007
     }
   end
 end
-
-CommitStatusEnums.prepend_if_ee('EE::CommitStatusEnums')

ee/app/models/ee/commit_status_enums.rb

-# frozen_string_literal: true
-
-module EE
-  module CommitStatusEnums
-    extend ActiveSupport::Concern
-
-    class_methods do
-      extend ::Gitlab::Utils::Override
-
-      override :failure_reasons
-      def failure_reasons
-        super.merge(protected_environment_failure: 1_000,
-                    upstream_bridge_project_not_found: 1_004,
-                    insufficient_upstream_permissions: 1_005)
-      end
-    end
-  end
-end