test_tarfile_vs_tar fail on macOS (again)

Bug report

Bug description:

Python-3.14 on macOS 26.0 (Tahoe) failed a self-test:

test_tarfile_vs_tar (test.test_shutil.TestArchives.test_tarfile_vs_tar) ... tar: unrecognized option '--no-mac-metadata'
Try 'tar --help' or 'tar --usage' for more information.
ERROR

The full detail is:

======================================================================
ERROR: test_tarfile_vs_tar (test.test_shutil.TestArchives.test_tarfile_vs_tar)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/sw/build.build/python314-3.14.0-1/Python-3.14.0/Lib/test/test_shutil.py", line 1752, in test_tarfile_vs_tar
    subprocess.check_call(tar_cmd, cwd=root_dir,
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
                          stdout=subprocess.DEVNULL)
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/sw/build.build/python314-3.14.0-1/Python-3.14.0/Lib/subprocess.py", line 419, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['tar', '--no-mac-metadata', '-cf', 'archive2.tar', 'dist']' returned non-zero exit status 64.

----------------------------------------------------------------------

I have another 'tar' ahead of Apple's in my path that does not have the Apple-specific flag features. if I remove the addition of '--no-mac-metadata' (added to resolve #109980) it passes. Or if I hardcode the test to use Apple's at line 1740:

-       tar_cmd = ['tar', '-cf', 'archive2.tar', base_dir]
+       tar_cmd = ['/usr/bin/tar', '-cf', 'archive2.tar', base_dir]

it passes. But interestingly, if I hardcode to use Apple's and remove that flag, it still passes.

CPython versions tested on:

3.14

Operating systems tested on:

macOS

Lib/test/test_shutil.py の test_tarfile_vs_tar 付近と、1740 行目の tar コマンドから始めます。PATH の先頭側にある Apple 製ではない tar を使って macOS で失敗を再現し、その後、/usr/bin/tar を使った場合のテスト動作と比較します。サポートされている tar の選択でセルフテストが動作し、リグレッションケースがカバーされれば完了です。