DeepSpeed

35251023 - [ZeRO Infinity] Allow Init to take a dict for the deepspeed config (#983)

[ZeRO Infinity] Allow Init to take a dict for the deepspeed config (#983) * Add check to see if json file is already loaded * Update doc * Address review * Remove doc comment Co-authored-by: Olatunji Ruwase <olruwase@microsoft.com>