[3.10] bpo-46416: Allow direct invocation of `Lib/test/test_typing.py` (GH-30641) (GH-30697)

Use `__name__`
(cherry picked from commit 2792d6d18eab3efeb71e6397f88db86e610541f1)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>