CLN: de-duplicate in arithmetic/test_numeric
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

- Move one test to another one parametrized.
- Address one part of TODO item
thanks @ivanovmg 