DeepSpeed

149f60b7 - stage3.py: do not scale if gradient_predivide_factor is 1.0 (#3630)

stage3.py: do not scale if gradient_predivide_factor is 1.0 (#3630) this change also aligns with the logic before reduce_scatter_coalesced Co-authored-by: Olatunji Ruwase <olruwase@microsoft.com>