Add ONNX support for Logdet (#29767)
Summary:
Exported as combination of ONNX::Log and ONNX::Det.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29767
Reviewed By: hl475
Differential Revision: D18499762
Pulled By: houseroad
fbshipit-source-id: e6f2298635a995f01b2913d8958b5e1ca9d04058
