Reduce pytest blocklist (#96016)
`TestCase = object` or variations of it get switched to `TestCase = NoTest`.
unittest collects test based on subclassing unittest.TestCase, so setting TestCase = object removes it from unittest test collection. pytest collects based on name (https://docs.pytest.org/en/7.1.x/reference/reference.html#confval-python_classes) but can be told to ignore a class (bottom of https://docs.pytest.org/en/7.1.x/example/pythoncollection.html#changing-naming-conventions)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/96016
Approved by: https://github.com/ZainRizvi, https://github.com/huydhn
