DeepSpeed

1e40ee4a - [squash] Staging autotuning v4

[squash] Staging autotuning v4 Co-authored-by: Cheng Li <pistasable@gmail.com> Co-authored-by: Minjia Zhang <minjiaz@microsoft.com> Co-authored-by: Olatunji Ruwase <olruwase@microsoft.com> Co-authored-by: Jeff Rasley <jerasley@microsoft.com>