Sort imports in `Tests/` by hugovk · Pull Request #7736 · python-pillow/Pillow

Ruff didn't isort imports in #7733 and #7732, it didn't move from typing import ... imports to the stdlib group because we're skipping isort for Tests/.

This config was added in the original Ruff PR: #6966. I had a quick check but couldn't see the reason why we added it there.

Anyway, let's remove it now and allow isorting Tests/.