Cannot make venv on `3.14` when system encoding is not utf-8

[StanFromIreland]

Bug report

Bug description:

Buildbot fails: https://buildbot.python.org/?#/builders/1764/builds/37/steps/6/logs/stdio

When trying to make a venv:

$ python3.14 -m venv venv
Unable to symlink '/tmp/venv/bin/python' to '/tmp/venv/bin/\U0001d70bthon'
Error: 'latin-1' codec can't encode character '\U0001d70b' in position 14: ordinal not in range(256)

Results in corrupt venv.

Parent issue: #133677

CPython versions tested on:

3.14

Operating systems tested on:

Linux

Linked PRs

• [3.14] gh-134060: Don't create a certain symlink in venv if platform does not support it #134061