det_backward: more robust and with complex support (#58195)
Summary:
As per title.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58195
Reviewed By: albanD
Differential Revision: D29361872
Pulled By: anjali411
fbshipit-source-id: b1f0fec7e3ac52acd1481bcc878cc0c1d07c1852
