Move DataFrame.info() to live with similar functions
#31233

- [x ] closes #31233
(Not sure these are relevant for a doc change?)
- [ ] tests added / passed
- [ ] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

lgtm. ping on green. thanks @jpeacock29 