[issue43244] Move PyArena C API to the internal C API

[hai shi]

Change by hai shi <shihai1991 at 126.com>:


----------
keywords: +patch
nosy: +shihai1991
nosy_count: 1.0 -> 2.0
pull_requests: +23470
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/24688

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43244>
_______________________________________