fix(ivy): @NgModule() should not require an metadata object (#27278)

There is no test in this diff because I'm making an already failing test pass.

PR Close #27278

packages/core/src/render3/jit/module.ts

@@ -23,7 +23,7 @@ const EMPTY_ARRAY: Type<any>[] = [];
  *
  * This function automatically gets called when a class has a `@NgModule` decorator.
  */
-export function compileNgModule(moduleType: Type<any>, ngModule: NgModule): void {
+export function compileNgModule(moduleType: Type<any>, ngModule: NgModule = {}): void {
   compileNgModuleDefs(moduleType, ngModule);
   setScopeOnDeclaredComponents(moduleType, ngModule);
 }