feat(ngcc): migrate services that are missing @Injectable() (#33362)

A class that is provided as Angular service is required to have an
`@Injectable()` decorator so that the compiler generates its injectable
definition for the runtime. Applications are automatically migrated
using the "missing-injectable" schematic, however libraries built for
older version of Angular may not yet satisfy this requirement.

This commit ports the "missing-injectable" schematic to a migration that
is ran when ngcc is processing a library. This ensures that any service
that is provided from an NgModule or Directive/Component will have an
`@Injectable()` decorator.

PR Close #33362

packages/compiler-cli/src/ngtsc/annotations/index.ts

@@ -16,3 +16,4 @@ export {InjectableDecoratorHandler} from './src/injectable';
 export {NgModuleDecoratorHandler} from './src/ng_module';
 export {PipeDecoratorHandler} from './src/pipe';
 export {NoopReferencesRegistry, ReferencesRegistry} from './src/references_registry';
+export {forwardRefResolver} from './src/util';