deprecate MockFetchApi class, keep MockFetchApiOptions

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor

packages/frontend-test-utils/src/apis/FetchApi/MockFetchApi.ts

@@ -89,6 +89,7 @@ export interface MockFetchApiOptions {
  * A test helper implementation of {@link @backstage/core-plugin-api#FetchApi}.
  *
  * @public
+ * @deprecated Use `mockApis.fetch()` instead.
  */
 export class MockFetchApi implements FetchApi {
   private readonly implementation: FetchApi;

packages/frontend-test-utils/src/apis/index.ts

@@ -66,6 +66,7 @@ export type { ErrorWithContext } from './ErrorApi/MockErrorApi';
 
 /**
  * @public
+ * @deprecated Use `mockApis.fetch()` instead.
  */
 export type { MockFetchApi } from './FetchApi';