Message 392332 - Python tracker

I would prefer to limit the usage of the internal C API in extension modules built as dynamic libraries. See bpo-41111: "[C API] Convert a few stdlib extensions to the limited C API (PEP 384)".

Also, this issue is motived by PR 25653 which requires to use the internal C API in many C extensions. But I proposed a different approach, PR 25710, which prevents that.