message: backend-test-utils: use empty config instead of trying to load
diff: @@ -18,7 +18,6 @@ import {
  Backend,
  createSpecializedBackend,
  cacheFactory,
  - configFactory,
  databaseFactory,
  discoveryFactory,
  httpRouterFactory,
  @@ -38,7 +37,9 @@ import {
  createServiceFactory,
  BackendFeature,
  ExtensionPoint,
  + coreServices,
  } from '@backstage/backend-plugin-api';
  +import { ConfigReader } from '@backstage/config';
  /** @alpha */
  export interface TestBackendOptions<
  @@ -65,8 +66,12 @@ export interface TestBackendOptions<
  }
  const defaultServiceFactories = [
  + createServiceFactory({
  + service: coreServices.config,
  + deps: {},
  + factory: async () => new ConfigReader({}, 'test'),
  + })(),
  cacheFactory(),
  - configFactory(),
  databaseFactory(),
  discoveryFactory(),
  httpRouterFactory(),
  