Reenable memory format test for some unary functions (#39102)
Summary:
Many of them have already been migrated to ATen
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39102
Differential Revision: D22162193
Pulled By: VitalyFedyunin
fbshipit-source-id: 80db9914fbd792cd610c4e8ab643ab97845fac9f
