[testing] change unaryufunc default dtypes (#57616)
Summary:
Reference: https://github.com/pytorch/pytorch/pull/56646#pullrequestreview-644839124
Pull Request resolved: https://github.com/pytorch/pytorch/pull/57616
Reviewed By: albanD
Differential Revision: D28249129
Pulled By: mruberry
fbshipit-source-id: 2cfc837fd49100d2b1b2a09d9ca6db93e089e099
