`No module named 'distutils'` running tests under Python 3.12

[JayBazuzi]

To reproduce:

1. Under Python 3.12 run ./run_tests.sh

Result:

__________________________________ ERROR collecting tests/mrjob/test_mrjob.py ___________________________________
ImportError while importing test module '/Users/jaybazuzi/source/ApprovalTests_Python/tests/mrjob/test_mrjob.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/importlib/__init__.py:90: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
tests/mrjob/test_mrjob.py:1: in <module>
    from mrjob.job import MRJob
.tox/py/lib/python3.12/site-packages/mrjob/job.py:36: in <module>
    from mrjob.conf import combine_dicts
.tox/py/lib/python3.12/site-packages/mrjob/conf.py:34: in <module>
    from mrjob.util import expand_path
.tox/py/lib/python3.12/site-packages/mrjob/util.py:31: in <module>
    from distutils.spawn import find_executable
E   ModuleNotFoundError: No module named 'distutils'

[nitsanavni]

✅ CI passed
✅ And it works on a fresh gitpod workspace (didn't work yesterday)