BUG: GH-35558 merge_asof tolerance error
- [x] closes #35558
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

@simonjayhawkins Sorry, I made a mistake for the test code. It was fixed. Thanks @ikedaosushi  @meeseeksdev backport 1.1.x

