[issue41111] [C API] Convert a few stdlib extensions to the limited C API (PEP 384)

[hai shi]

hai shi <shihai1991 at 126.com> added the comment:

> By the way, maybe Py_LIMITED_API should be defined in xxlimited.c, rather than in setup.py.

+1. Defining Py_LIMITED_API in xxlimited.c is more direct than in setup.py. so I created the PR-25115.

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