Bunches of new errors on NumPy CI

[charris]

See https://github.com/numpy/numpy/actions/runs/27465742694/job/81220959785?pr=31626 for examples. Lots like this:

ERROR numpy/_core/tests/test_array_coercion.py::TestStringDiscovery - pytest.PytestRemovedIn10Warning: Passing a non-Collection iterable to param...

[bluetech]

Yes, this is an intentional deprecation warning. I guess numpy turns warnings to errors, in which case it will need to either temporarily ignore the deprecation or resolve it.

You can find details on this deprecation here: https://docs.pytest.org/en/stable/deprecations.html#non-collection-iterables-in-pytest-mark-parametrize

If for some reason you run into trouble converting iterators to collections, let us know.