Testing: Improve interaction between dtypes and ops decorators (#48426)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48426
Tests are run on the intersection of the dtypes requested and the types that are
supported by the operator (or are _not_ if `unsupported_dtypes_only` is used).
Test Plan: Imported from OSS
Reviewed By: ngimel
Differential Revision: D25205835
Pulled By: mruberry
fbshipit-source-id: 2c6318a1a3dc9836af7361f32caf9df28d8a792b
