Replace distutils.sysconfig.get_python_lib with sysconfig.get_path

[chigozienri]

Fixes #1449

Removes the dependence on distutils, by replacing distutils.sysconfig.get_python_lib with sysconfig.get_path

distutils.sysconfig.get_python_lib with no flags defaults to plat_specific=0, standard_lib=0
https://github.com/pypa/distutils/blob/main/distutils/sysconfig.py

This is equivalent to sysconfig.get_path('purelib')
https://docs.python.org/3/library/sysconfig.html?highlight=purelib

Checklist

• [ n/a ] Tests
• [ n/a ] Update API reference (docs/source/traits_api_reference)
• [ n/a ] Update User manual (docs/source/traits_user_manual)
• [ n/a ] Update type annotation hints in traits-stubs

[rahulporuri]

LGTM. I tried this out locally and it looks correct. I'm not sure this code path is tested by the docs though.

[mdickinson]

LGTM as a quick fix, though I think we need to revisit find_resource and its uses.

I took the liberty of making a drive-by style fix, changing the from sysconfig import to a plain import sysconfig. (Very much a personal thing, but my preference is to use plain import for std. lib. modules where there's no reason to do otherwise.)