[7.1.0] Manipulate the local filesystem directly in the writeLocalFil…

…e test helper. (#21272)

To ensure that we're actually modifying the local filesystem, even if
the RemoteActionFileSystem#getOutputStream implementation changes in the
future.

PiperOrigin-RevId: 605539937
Change-Id: I1e17642153e2faec357a0778b9673c1f3fff0ea8

src/test/java/com/google/devtools/build/lib/remote/RemoteActionFileSystemTest.java

@@ -1139,8 +1139,9 @@ protected FileArtifactValue injectRemoteFile(
  @Override
  protected void writeLocalFile(FileSystem actionFs, PathFragment path, String content)
  throws IOException {
- actionFs.getPath(path).getParentDirectory().createDirectoryAndParents();
- FileSystemUtils.writeContent(actionFs.getPath(path), UTF_8, content);
+ FileSystem localFs = getLocalFileSystem(actionFs);
+ localFs.getPath(path).getParentDirectory().createDirectoryAndParents();
+ FileSystemUtils.writeContent(localFs.getPath(path), UTF_8, content);
  }
 
  /** Returns a remote artifact and puts its metadata into the action input map. */