REF: remove special-casing for internal EAs from format_array
- [ ] closes #26837
- [ ] tests added / passed
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [n/a ] whatsnew entry

cc @jorisvandenbossche 

changes to tests for spacing before Datetime64TZ, which now have additional space.