message: fix(ivy): add support for providers in TestBed.configureCompiler
  Adds support for the `providers` that are passed in through `TestBed.configureCompiler` and scopes the error only if the consumer has passed in `useJit`.
  PR Close
diff: @@ -251,7 +251,13 @@ export class TestBedRender3 implements Injector, TestBed {
  }
  configureCompiler(config: {providers?: any[]; useJit?: boolean;}): void {
  - throw new Error('the Render3 compiler is not configurable !');
  + if (config.useJit != null) {
  + throw new Error('the Render3 compiler JiT mode is not configurable !');
  + }
  +
  + if (config.providers) {
  + this._providerOverrides.push(...config.providers);
  + }
  }
  configureTestingModule(moduleDef: TestModuleMetadata): void {
  