Import `_ios_support` raises RuntimeError on Windows

# Bug report

### Bug description:

See also:
- https://github.com/python/typeshed/actions/runs/9161558906/job/25186691740?pr=11987
- https://github.com/python/mypy/pull/17270

### CPython versions tested on:

3.13

### Operating systems tested on:

Windows


### Linked PRs
* gh-119254
* gh-119265