Adding CUDA version for C2 operators generate proposals and nms (#13694)
Summary:
Related to issue #13684
Pull Request resolved: https://github.com/pytorch/pytorch/pull/13694
Reviewed By: wat3rBro
Differential Revision: D13017791
Pulled By: newstzpz
fbshipit-source-id: 4bdc58e474d8e1f6cd73a02bf51f91542a2b9d0b
