TST: Series constructor behavior is consistent for mixed float NaN and int dtype data
- [x] closes #22585
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Thanks @arw2019  um, why does this solve the issue in #22585?  IIUC the issue there was that Series(list_with_nan, dtype=inty) raises while Series(ndarray_with_nan, dtype=inty) coerces, so this is just testing the _inconsistent_ behavior or maybe it was consistent at the time of this PR but the ndarray case has been changed since then?