adding packed bert from optimum-main#71

Draft

arsalanu wants to merge 12 commits intogradient-ai:mainfrom

graphcore:packed-bert

Commits on Mar 17, 2023

changing checkpoint directory to env var
arsalanu
committed

Commits on Mar 20, 2023

updated .gradient files with symlinks and prepare-datasets config + readjusted paths in notebooks
arsalanu
committed

Commits on Mar 23, 2023