`_convert_coo_to_csr` CPP and CUDA functionality (#61838)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/57381 and improves https://github.com/pytorch/pytorch/pull/61340 via dedicated `coo_to_csr` functionalities.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61838
Reviewed By: ezyang
Differential Revision: D30132736
Pulled By: cpuhrsch
fbshipit-source-id: a1fd074c0d70366a524d219a620b94f8bed71d7c
