DeepSpeed

2420e23f - DeepSpeed-Chat Llama2/stability release (#4240)

DeepSpeed-Chat Llama2/stability release (#4240) Co-authored-by: HeyangQin <heyangqin@microsoft.com> Co-authored-by: Lev Kurilenko <lekurile@microsoft.com> Co-authored-by: Molly Smith <mosm@microsoft.com>