TensorRTStableDiffusionImg2ImgPipeline: can't set attribute 'guidance_scale'

[Jannchie]

Describe the bug

guidance_scale became a not setable prop. So this example will report an error.

Reproduction

I'm using the example code:

https://github.com/huggingface/diffusers/blob/main/examples/community/README.md#tensorrt-image2image-stable-diffusion-pipeline

Logs

Traceback (most recent call last):
  File "C:\Code\diffusers-playground\img2img\sdt.py", line 41, in <module>
    image = pipe(
  File "C:\Users\Jannchie\anaconda3\envs\streamdiffusion\lib\site-packages\torch\utils\_contextlib.py", line 115, in decorate_context
    return func(*args, **kwargs)
  File "C:\Code\diffusers-playground\img2img\utils\__init__.py", line 1007, in __call__
    self.guidance_scale = guidance_scale
  File "C:\Users\Jannchie\anaconda3\envs\streamdiffusion\lib\site-packages\diffusers\pipelines\pipeline_utils.py", line 607, in __setattr__
    super().__setattr__(name, value)
AttributeError: can't set attribute 'guidance_scale'

### System Info

- `diffusers` version: 0.24.0
- Platform: Windows-10-10.0.22631-SP0
- Python version: 3.10.13
- PyTorch version (GPU?): 2.1.0+cu121 (True)
- Huggingface_hub version: 0.20.1
- Transformers version: 4.36.2
- Accelerate version: 0.25.0
- xFormers version: 0.0.22.post7
- Using GPU in script?: <fill in>
- Using distributed or parallel set-up in script?: <fill in>

### Who can help?

_No response_