Removes floating_dtype decorator from test_torch and test_cuda (#27599)
Summary:
Per title. Also makes a few test_torch tests generic.
This PR removes ~half the floating_dtype decorators. Follow-up will remove the rest.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/27599
Differential Revision: D17840056
Pulled By: mruberry
fbshipit-source-id: 428bb5498c452083e3608325e0b548b1d75baf2d
