Add `@support.requires_gil_enabled` decorator to mark tests that require the GIL

[colesbury]

Feature or enhancement

@Eclips4 points out that it might be time to add a dedicated decorator for marking tests that require the GIL:

He writes:

I think this helper should look like this:

def requires_gil_enabled(test):
    if Py_GIL_DISABLED:
        return unittest.skip('needs the GIL enabled')(test)
    return test

Linked PRs

• gh-117478: Add @support.requires_gil_enabled decorator #117479