[core/apis] added pluginId to feature flag metadata

packages/core/src/api/app/AppBuilder.tsx

@@ -90,7 +90,10 @@ export default class AppBuilder {
             break;
           }
           case 'feature-flag': {
-            registeredFeatureFlags.push({ name: output.name });
+            registeredFeatureFlags.push({
+              pluginId: plugin.config.id,
+              name: output.name,
+            });
             break;
           }
           default:

packages/core/src/api/app/FeatureFlags.tsx

@@ -71,6 +71,7 @@ export const FeatureFlags = new FeatureFlagsImpl();
  * Backstage components. This enables viewing all of the available flags.
  */
 export interface FeatureFlagsEntry {
+  pluginId: string;
   name: FeatureFlagName;
 }