Reorganize imports to be compliant with isort (and conventional)
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

can you add this file to the files checked by isort in ci/code_checks.sh No problem, check out #35709  > No problem, check out #35709

ok idealy it would have been in this PR but ok