Fix arrow groupby na
- [x] closes #60567 
- [x] Tests added and passed
- [x] All code checks passed
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [x] Added an entry in the latest `doc/source/whatsnew/v3.0.0.rst` file for the bug fix.

The CI is now green. @rhshadrach can you please merge this PR. Thanks @asharmalik19 