Fix gradient-checkpointing option is ignored in SDXL+LoRA training. (#6388)#6402

sayakpaul merged 5 commits intohuggingface:mainhuggingface/diffusers:mainfrom

2510:fix-gradient-checkpointing-ignored-in-sdxl-lora2510/diffusers:fix-gradient-checkpointing-ignored-in-sdxl-loraCopy head branch name to clipboard