BUG: MultiIndex comparison with tuple #21517
- [x] closes #21517
- [x] closes #34180
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

also closes #34180, just pushed with a test for that, will update OP thanks