TST: scope xfail for test_np_fix to non-numpy-dev to avoid XPASS in dev CI

[antznette1]

Notes:

• test_np_fix now uses [pytest.mark.xfail(condition=not](cci:4://file://pytest.mark.xfail(condition=not:0:0-0:0) is_numpy_dev, reason=...) without strict=True.
• No runtime probing; minimal and idiomatic.

[jbrockmendel]

Most of this PR is not doing what the description says. Did a human write this?

[antznette1]

Most of this PR is not doing what the description says. Did a human write this?

Most of this PR is not doing what the description says. Did a human write this?

Thanks for the review. I’ve reduced the PR to a single test change:
test_np_fix uses is_numpy_dev in the xfail marker (no strict, no runtime probing). The title & description now reflect the minimal scope. The intent is to avoid numpy-dev/python-dev XPASS(strict) failures while keeping behavior unchanged on non-dev builds. Happy to adjust if you prefer a different guard.