diffusers

15f1bab1 - Fix gradient checkpointing bugs in freezing part of models (requires_grad=False) (#3404)

Fix gradient checkpointing bugs in freezing part of models (requires_grad=False) (#3404) * gradient checkpointing bug fix * bug fix; changes for reviews * reformat * reformat --------- Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>