Added support for complex torch.symeig (#45121)
Summary:
This PR adds support for complex-valued input for `torch.symeig`.
TODO:
- [ ] complex cuda tests raise `RuntimeError: _th_bmm_out not supported on CUDAType for ComplexFloat`
Update: Added xfailing tests for complex dtypes on CUDA. Once support for complex `bmm` is added these tests will work.
Fixes https://github.com/pytorch/pytorch/issues/45061.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/45121
Reviewed By: mrshenli
Differential Revision: D24049649
Pulled By: anjali411
fbshipit-source-id: 2cd11f0e47d37c6ad96ec786762f2da57f25dac5
