TemporaryDirectory ignore_cleanup_errors flag is not robustic

Bug report

Bug description:

When using ignore_cleanup_errors flag in TemporaryDirectory context manager, there's a path that will raise an issue.

In the onerror function that's being called when error in rmtree function:
If the first error is FileNotFound, pass
If it's everything else, check the ignore_errors flag, and raise if set to False
if the error was PermissionsError first try to change the permissions (the call to _resetperms , and then try to remove the files again. But the the call to resetparams is in an outer try, which is a lot weaker, and catching only the FileNotFoundError . But in our case, this very call raised PermissionError (yet again). It was not caught and raised back to our code.

Internal logs

2025-06-16 08:07:41 - ERROR - failed to solve strawman_local_enumeration: [Errno 1] Operation not permitted: '/tmp/tmpsrelpq9p/__pycache__'
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.11.8/x64/lib/python3.11/shutil.py", line 701, in _rmtree_safe_fd
    os.unlink(entry.name, dir_fd=topfd)
PermissionError: [Errno 13] Permission denied: 'main.cpython-310.pyc'


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/runner/work/CTF/CTF/src/solvers/solvers/solve_remote/solve_remote.py", line 212, in solve_remote_single
    return solve_challenge_on_local_solver(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

...

 File "/opt/hostedtoolcache/Python/3.11.8/x64/lib/python3.11/tempfile.py", line 287, in _resetperms
    _dont_follow_symlinks(_os.chmod, path, 0o700)
  File "/opt/hostedtoolcache/Python/3.11.8/x64/lib/python3.11/tempfile.py", line 278, in _dont_follow_symlinks
    func(path, *args)
PermissionError: [Errno 1] Operation not permitted: '/tmp/tmpsrelpq9p/__pycache__'

CPython versions tested on:

3.11

Operating systems tested on:

macOS, Linux

Linked PRs

• gh-150696

Comece com _resetperms de tempfile.py e o caminho de limpeza de TemporaryDirectory e, em seguida, compare-o com o tratamento de onerror de shutil.rmtree. Reproduza o caso de PermissionError no Python 3.11 no macOS ou Linux e adicione um teste de regressão mostrando que ignore_cleanup_errors impede que a falha de limpeza seja propagada.