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

sdk/lib/_internal/pub_generated/test/global/run/unknown_package_test.dart

Index: sdk/lib/_internal/pub_generated/test/global/run/unknown_package_test.dart
diff --git a/sdk/lib/_internal/pub/test/global/run/unknown_package_test.dart b/sdk/lib/_internal/pub_generated/test/global/run/unknown_package_test.dart
similarity index 55%
copy from sdk/lib/_internal/pub/test/global/run/unknown_package_test.dart
copy to sdk/lib/_internal/pub_generated/test/global/run/unknown_package_test.dart
index 291577a345b91bded1350f82f61c66588c324b24..0382ebcd76646643a9a617c1e3215114c73d4ea9 100644
--- a/sdk/lib/_internal/pub/test/global/run/unknown_package_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/global/run/unknown_package_test.dart
@@ -1,18 +1,12 @@
-// Copyright (c) 2014, 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.
-
 import 'package:scheduled_test/scheduled_test.dart';
-
 import '../../../lib/src/exit_codes.dart' as exit_codes;
 import '../../test_pub.dart';
-
 main() {
   initConfig();
   integration('errors if the package is not activated', () {
     serveNoPackages();
-
-    schedulePub(args: ["global", "run", "foo:bar"],
+    schedulePub(
+        args: ["global", "run", "foo:bar"],
         error: startsWith("No active package foo."),
         exitCode: exit_codes.DATA);
   });