DeepSpeed

867da307 - Inference Refactor (replace_with_policy, model_implementations) (#2554)

Inference Refactor (replace_with_policy, model_implementations) (#2554) Co-authored-by: Lev Kurilenko <lekurile@microsoft.com> Co-authored-by: Michael Wyatt <michaelwyatt@microsoft.com> Co-authored-by: Jeff Rasley <jerasley@microsoft.com>