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

sdk/lib/_internal/pub_generated/test/get/path/absolute_path_test.dart

+import 'package:path/path.dart' as path;
+import '../../descriptor.dart' as d;
+import '../../test_pub.dart';
+main() {
+  initConfig();
+  integration('path dependency with absolute path', () {
+    d.dir('foo', [d.libDir('foo'), d.libPubspec('foo', '0.0.1')]).create();
+    d.dir(appPath, [d.appPubspec({
+        "foo": {
+          "path": path.join(sandboxDir, "foo")
+        }
+      })]).create();
+    pubGet();
+    d.dir(
+        packagesPath,
+        [d.dir("foo", [d.file("foo.dart", 'main() => "foo";')])]).validate();
+    d.dir("moved").create();
+    scheduleRename(packagesPath, "moved/packages");
+    d.dir(
+        "moved/packages",
+        [d.dir("foo", [d.file("foo.dart", 'main() => "foo";')])]).validate();
+  });
+}