Windows only provides the 32-bit API and using todo_wine win_skip() in
the 64-bit case would imply Wine needs fixing. So it's simpler to use
a plain skip().
Other schemes like picking between skip() and win_skip() based on bitness feel like they would be way overkill.
--
v2: msvcrt/tests: Check that some functions are only available in 32-bit code.
https://gitlab.winehq.org/wine/wine/-/merge_requests/2811