[3.10] GH-87235: Make sure "python /dev/fd/9 9</path/to/script.py" works on macOS (GH-99768)#99817

ambv merged 5 commits intopython:3.10python/cpython:3.10from

miss-islington:backport-d08fb25-3.10miss-islington/cpython:backport-d08fb25-3.10Copy head branch name to clipboard