REF: uses_mask in group_any_all
any, all, and std go through GroupBy._get_cythonized_result instead of the more-standard WrappedCythonOp.  I'm trying to refactor any/all to use the other path, and as a step toward that am trying to make group_any_all follow the same patterns as the other functions in libgroupby.

The implementation here looks to me like it should behave identically to the existing implementation, but it fails a bunch of tests (mostly in tests/groupby/test_any_all.py).  Hoping @phofl can explain where I'm going wrong.
Your suggestion helped, green thx @jbrockmendel 