CLN: Consistent pandas.util.testing imports in pandas/tests/frame - part 3
Part of #29272 

Fyi: All changes are generated from a script posted in the issue.

- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`

thanks @SaturnFromTitan 