[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:

> The main limitation to use the limited C API for stdlib is Argument Clinic which attempts to always emit the most efficient code, like using the METH_FASTCALL calling convention and use private functions like _PyArg_CheckPositional() or "static _PyArg_Parser _parser".

PR-26080 adds the feature that Argument Clinic to support to use the Limited C API.
METH_FASTCALL is the part of the stable ABI in PR-23009.
Do we need convert METH_VARARGS and METH_KEYWORDS as the part of the stable ABI too(something like METH_FASTCALL)?

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<https://bugs.python.org/issue41111>
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