[HSDP] Fix Node 1 unable receive parameters from Node 0 (#108331)
When use hybrid_shard mode FSDP,
state.process_group means gpu_0,1,,,~,7 on node 0，so gpus on node 1 cannot receive parameters, setting process_group to default_group（global_group）can fix this issue
Fixes #ISSUE_NUMBER
Pull Request resolved: https://github.com/pytorch/pytorch/pull/108331
Approved by: https://github.com/awgu
