BUG: inconsistent name-retention in Series ops
- [x] closes #33930
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

As a follow-up I think we can remove a bunch of name-based tests from tests.arithmetic.
great. can you add a whatsnew note and ping on green. i would specific mentions of broken operators is ok (or is this *all* binary ops)? ping