[ONNX] Add binary_cross_entropy_with_logits op to ONNX opset version 12 (#49675) (#50908)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/50908
Fixes #{#47997}
Exporting the operator binary_cross_entropy_with_logits to ONNX opset version 12.
Test Plan: Imported from OSS
Reviewed By: pbelevich
Differential Revision: D26050885
Pulled By: SplitInfinity
fbshipit-source-id: e4167895eed804739aa50481679500a4d564b360
