TEST: distutils.tests.test_mingw32ccompiler.py is fragile

[mattip]

Over in PR #20383, @lithomas1 needed to add PY_DIR=$(python -c "import sys; print(sys.prefix)"); mkdir $PY_DIR/libs in order to make this test work. The test should be made more robust, then those lines in the cibuildwheel CI run can be removed.

[rgommers]

No longer necessary since we switched to Meson, closing. Thanks Matti and Thomas.