TST: check compatibility with pyarrow types_mapper parameter
- [x] closes #xxxx
- [x] tests added / passed
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
- [x] whatsnew entry

Closes #44368
Possible this was actually just a misunderstanding on my part of the `__from_arrow__` method. Creating an instance of the dtype resolves my issue.

https://pandas.pydata.org/pandas-docs/stable/development/extending.html#compatibility-with-apache-arrow

I still think it'd be worth having these tests, so I can update my PR to do that. can you merge master & @jorisvandenbossche comment (agree) thanks @tswast 