Update train_dreambooth_lora_sd15_advanced.py (#7433)

you cannot specify `type="bool"` and `action="store_true"` at the same time.
remove excessive and buggy `type=bool`.
Co-authored-by: Linoy Tsaban <57615435+linoytsaban@users.noreply.github.com>

examples/advanced_diffusion_training/train_dreambooth_lora_sd15_advanced.py

@@ -656,7 +656,6 @@ def parse_args(input_args=None):
     )
     parser.add_argument(
         "--use_dora",
-        type=bool,
         action="store_true",
         default=False,
         help=(