Improve unittest class printing for generated classes (#95806)
Previously they printed like `torch._dynamo.testing.make_test_cls_with_patches.<locals>.DummyTestClass`; now they print as `torch._dynamo.testing.StaticDefaultDynamicShapesUnspecTests`
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/95806
Approved by: https://github.com/dagitses
