[develop] Support release_grads in Pipeline Parallel and Sharding stage1 v1/v2 #59739
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PR types
Bug fixes
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Description
[develop] Support release_grads in Pipeline Parallel and Sharding stage1 v1/v2 (card-5226)
This is a cherry-pick PR for PR-58441, PR-58462, PR-58621 from
incubate/new_frl
branch.