Merge pull request #33148 from backstage/rugvip/move-extensionFactoryMiddleware-to-frontend-app-api

Move `ExtensionFactoryMiddleware` from frontend-plugin-api to frontend-app-api

packages/frontend-plugin-api/report.api.md

@@ -1215,7 +1215,7 @@ export type ExtensionDefinitionParameters = {
   params?: object | ExtensionBlueprintDefineParams;
 };
 
-// @public (undocumented)
+// @public @deprecated (undocumented)
 export type ExtensionFactoryMiddleware = (
   originalFactory: (contextOverrides?: {
     config?: JsonObject;

packages/frontend-plugin-api/src/wiring/types.ts

@@ -60,7 +60,10 @@ export type ExtensionDataContainer<UExtensionData extends ExtensionDataRef> =
       : never;
   };
 
-/** @public */
+/**
+ * @public
+ * @deprecated Moved to {@link @backstage/frontend-app-api#ExtensionFactoryMiddleware}
+ */
 export type ExtensionFactoryMiddleware = (
   originalFactory: (contextOverrides?: {
     config?: JsonObject;