Store the async-await compiled pub code directly in the repo.

sdk/lib/_internal/pub_generated/test/validator/utils.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
 library validator.utils;
-
 import 'package:scheduled_test/scheduled_test.dart';
-
 import '../test_pub.dart';
-
 void expectNoValidationError(ValidatorCreator fn) {
   expect(schedulePackageValidation(fn), completion(pairOf(isEmpty, isEmpty)));
 }
-
 void expectValidationError(ValidatorCreator fn) {
-  expect(schedulePackageValidation(fn),
+  expect(
+      schedulePackageValidation(fn),
       completion(pairOf(isNot(isEmpty), anything)));
 }
-
 void expectValidationWarning(ValidatorCreator fn) {
-  expect(schedulePackageValidation(fn),
+  expect(
+      schedulePackageValidation(fn),
       completion(pairOf(isEmpty, isNot(isEmpty))));
 }