Update ctypes stubs for Python3.12

[sobolevn]

Source: https://github.com/python/cpython/blob/3.12/Lib/ctypes/__init__.py#L572-L577

Basically, it depends on SIZEOF_TIME_T value to set a proper alias type.

[JelleZijlstra]

Stubtest complains it's not a union at runtime. (There are also a bunch of other stubtest complains, maybe it picked up the new beta?)

[sobolevn]

@JelleZijlstra you are right:

1. I've sent Fix CI for the [email protected] #10291 to fix the CI for the new beta
2. It is not a Union on any concrete system, but it is a "meta-union", because on different systems it will be a different thing. So, I guess it is safe to allowlist this type

[AlexWaygood]

you now need to remove the unused allowlist entry for c_time_t

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉

[AlexWaygood]

Thanks!