Possible missing symlink to `lib64` in user path schema on Linux Fedora 43, Python 3.14.2

Bug report

Bug description:

I'm not sure if this is distribution specific problem or something is broken in the core, so I'm filing it here first. I'm also not sure if it's CPython per se or needs to go into PyPA (pip etc).

Python 3.14.2 (main, Dec 5 2025, 00:00:00) [GCC 15.2.1 20251111 (Red Hat 15.2.1-4)] on linux

>>> pprint.pprint(sysconfig.get_paths("posix_user"))
{'data': '/home/arcivanov/.local',
 'include': '/home/arcivanov/.local/include/python3.14',
 'platlib': '/home/arcivanov/.local/lib/python3.14/site-packages',
 'platstdlib': '/home/arcivanov/.local/lib64/python3.14',
 'purelib': '/home/arcivanov/.local/lib/python3.14/site-packages',
 'scripts': '/home/arcivanov/.local/bin',
 'stdlib': '/home/arcivanov/.local/lib64/python3.14'}
>>> pprint.pprint(sysconfig.get_paths("venv"))
{'data': '/usr',
 'include': '/usr/include/python3.14',
 'platinclude': '/usr/include/python3.14',
 'platlib': '/usr/lib64/python3.14/site-packages',
 'platstdlib': '/usr/lib64/python3.14',
 'purelib': '/usr/lib/python3.14/site-packages',
 'scripts': '/usr/bin',
 'stdlib': '/usr/lib64/python3.14'}
>>> 

Firstly, in the posix_user the platlib goes into lib, whereas in venv everything that isn't pure is going into lib64.

Secondly, in the venv, this doesn't really matter due to there being a symlink from lib64 to lib. However, in the posix_user the lib64 is simply missing from /home/arcivanov/.local/ while being referenced in posix_user schema as something that should exist.

Venv:

drwxr-xr-x 1 arcivanov arcivanov 374 Dec  9 09:34 bin
-rw-r--r-- 1 arcivanov arcivanov  69 Dec  9 09:34 .gitignore
drwxr-xr-x 1 arcivanov arcivanov   0 Dec  9 09:34 include
drwxr-xr-x 1 arcivanov arcivanov  22 Dec  9 09:34 lib
lrwxrwxrwx 1 arcivanov arcivanov   3 Dec  9 09:34 lib64 -> lib
-rw-r--r-- 1 arcivanov arcivanov 305 Dec  9 09:34 pyvenv.cfg

CPython versions tested on:

3.14

Operating systems tested on:

Linux

首先，在 Linux Fedora 43 和 Python 3.14.2 上重现报告的 sysconfig.get_paths("posix_user") 和 sysconfig.get_paths("venv") 结果，然后比较 user 和 venv 的路径模式及其对 lib/lib64 的行为。完成的标准是确定 posix_user 应创建还是引用 lib64，并在 repository 确认了预期结果的情况下，通过文档记录该行为或使用回归覆盖对其进行修正。