[Advanced dreambooth lora] adjustments to align with canonical script (#8406)
* minor changes
* minor changes
* minor changes
* minor changes
* minor changes
* minor changes
* minor changes
* fix
* fix
* aligning with blora script
* aligning with blora script
* aligning with blora script
* aligning with blora script
* aligning with blora script
* remove prints
* style
* default val
* license
* move save_model_card to outside push_to_hub
* Update train_dreambooth_lora_sdxl_advanced.py
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Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>