TST: Added test for json containing the key "last_status_change_at"

- [x] closes #32409
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

@rivera-fernando can you merge master and respond to comments closing as stale