Chore: Fix software tests

[amotl]

About

Nightly test runs started failing 3 weeks ago, more specifically on Wed, 22 May 2024 2 o'clock AM GMT.

• https://github.com/crate/crate-python/actions/workflows/nightly.yml

Problem

Test runs on Python 3.12 are tripped by this error, coming from zc.buildout.

 Traceback (most recent call last):
  File "/path/to/.venv/bin/buildout", line 5, in <module>
    from zc.buildout.buildout import main
  File "/path/to/.venv/lib/python3.12/site-packages/zc/buildout/buildout.py", line 18, in <module>
    import zc.buildout.easy_install
  File "/path/to/.venv/lib/python3.12/site-packages/zc/buildout/easy_install.py", line 28, in <module>
    from pkg_resources import packaging
ImportError: cannot import name 'packaging' from 'pkg_resources'

• https://github.com/crate/crate-python/actions/runs/9184331584/job/25256465879#step:4:229

Thoughts

How could it have worked before?

[matriv]

Thx for taking care @amotl !