Migrate away from numpy.distutils

[stefanv]

Per wheel build CI:

numpy.distutils is deprecated since NumPy 1.23.0, as a result
of the deprecation of distutils itself. It will be removed for
Python >= 3.12. For older Python versions it will remain present.
It is recommended to use setuptools < 60.0 for those Python versions.
For more details, see:
https://numpy.org/devdocs/reference/distutils_status_migration.

[stefanv]

Completed.