DEPR: Remove errors argument in tz_localize
- [x] xref #22644
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

LGTM pending green Thanks @mroeschke  pls update #6581 if appropriate