pytorch

097defb1 - [device mesh] only check when world size > num_devices per host (#111091)

[device mesh] only check when world size > num_devices per host (#111091) as titled Pull Request resolved: https://github.com/pytorch/pytorch/pull/111091 Approved by: https://github.com/awgu, https://github.com/wz337 ghstack dependencies: #110898, #110900