fix RuntimeError: Input type (float) and bias type (c10::Half) should be the same in train_text_to_image_lora.py (#6259)
* fix RuntimeError: Input type (float) and bias type (c10::Half) should be the same
* format source code
* format code
* remove the autocast blocks within the pipeline
* add autocast blocks to pipeline caller in train_text_to_image_lora.py