build: fix benchmarks for render3 (#20855)

PR Close #20855

packages/core/src/core.ts

@@ -32,6 +32,7 @@ export {Type} from './type';
 export {EventEmitter} from './event_emitter';
 export {ErrorHandler} from './error_handler';
 export * from './core_private_export';
+export * from './core_render3_private_export';
 export {Sanitizer, SecurityContext} from './security';
 export * from './codegen_private_exports';
 export * from './animation/animation_metadata_wrapped';