Import `_ios_support` raises RuntimeError on Windows

[hauntsaninja]

Bug report

Bug description:

See also:

• https://github.com/python/typeshed/actions/runs/9161558906/job/25186691740?pr=11987
• Stubtest: ignore _ios_support mypy#17270

CPython versions tested on:

3.13

Operating systems tested on:

Windows

Linked PRs

• gh-119253: use ImportError in _ios_support #119254
• [3.13] gh-119253: use ImportError in _ios_support (GH-119254) #119265