Add support for training LTX 2.3 (#745)

* Initial support for ltx 2.3. Still needs a lot of testing to make sure it is all right.

* bump version

* Handle lora renaming keys for new ltx 2.3 layers

dgx_requirements.txt

@@ -13,7 +13,7 @@ opencv_python_headless==4.11.0.86
 # additional dependencies matching requirements.txt:
 torchao==0.10.0
 safetensors
-git+https://github.com/huggingface/diffusers@8600b4c10d67b0ce200f664204358747bd53c775
+git+https://github.com/huggingface/diffusers@072d15ee4289ffdc3aa9d65f8b94bc9271319d21
 transformers==4.57.3
 lycoris-lora==1.8.3
 flatten_json