The return of `ModuleNotFoundError: No module named 'packaging'` on Py3.12

[cclauss]

These two commands fail on Python 3.12 with ModuleNotFoundError: No module named 'packaging'
% pipx run --spec git+https://github.com/nodejs/gyp-next.git gyp --help
% pipx run --spec git+https://github.com/nodejs/gyp-next.git gyp --version

This was fixed in the past by:

• chore (main): vendor in Python packaging for Py3.12 #214

Also discussed in:

• fix: declare packaging in package discovery #247