Add tan_cuda for complex dtypes (#38400)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/38400
* #38399 Added autograd tests, disabled jit autograd tests for complex and added a separate list for tests for complex dtype only
Test Plan: Imported from OSS
Differential Revision: D21572209
Pulled By: anjali411
fbshipit-source-id: 7036029e9f8336139f5d54e0dfff9759f3bf8376
