Expand GRADIENT_IMPLEMENTED_FOR_COMPLEX to allow named tensors (#47289)
Summary:
Complex-valued named tensors do not support backpropagation currently. This is due to `tools/autograd/gen_variable_type.py` not containing `alias` in `GRADIENT_IMPLEMENTED_FOR_COMPLEX` which is required to constructed named tensors.
This fixes https://github.com/pytorch/pytorch/issues/47157. Also removed a duplicate `cholesky` in the list and added a test in `test_autograd.py`.
Apologies, this is a duplicate of https://github.com/pytorch/pytorch/issues/47181 as I accidently removed my pytorch fork.
cc: zou3519 anjali411
Pull Request resolved: https://github.com/pytorch/pytorch/pull/47289
Reviewed By: agolynski
Differential Revision: D24706571
Pulled By: zou3519
fbshipit-source-id: 2cc48ce38eb180183c5b4ce2f8f4eef8bcac0316
