[train_controlnet.py] Fix the LR schedulers when num_train_epochs is passed in a distributed training env (#8461)
* Create diffusers.yml
* fix num_train_epochs
* Delete diffusers.yml
* Fixed Changes
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Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>
Co-authored-by: YiYi Xu <yixu310@gmail.com>