load_lora_weights(), unload_lora_weights these doesn't work with LongCatImagePipeline.

### Model/Pipeline/Scheduler description

load_lora_weights(), unload_lora_weights these doesn't work with LongCatImagePipeline. Please add lora support for this model in diffusers.

### Open source status

- [ ] The model implementation is available.
- [ ] The model weights are available (Only relevant if addition is not a scheduler).

### Provide useful links for the implementation

_No response_

The issue names LongCatImagePipeline and the load_lora_weights()/unload_lora_weights() entry points; begin by inspecting that pipeline and comparable LoRA-enabled pipelines. Confirm the model implementation and weights are available, then make both methods work for LongCatImagePipeline and verify the behavior with the project's relevant tests.

Scritto dal modello di indicizzazione a partire dal testo della issue.