pytorch

be22b5d3 - [18/N] Add allgather_coalesced custom op with CPU/CUDA implementations (#89317)

[18/N] Add allgather_coalesced custom op with CPU/CUDA implementations (#89317) Differential Revision: [D41415321](https://our.internmc.facebook.com/intern/diff/D41415321) Pull Request resolved: https://github.com/pytorch/pytorch/pull/89317 Approved by: https://github.com/kwen2501