Want to use "strict=False" in from_pretrained

**What API design would you like to have changed or added to the library? Why?**
I want to add param "strict" in from_pretrained.
I want to add zerosft controlnet, but it can only implement by adding the set layers to unet class,
when I use from_pretrained, it can't use "strict=False"

**What use case would this enable or better enable? Can you give us a code example?**

def from_pretrained(cls, pretrained_model_name_or_path: Optional[Union[str, os.PathLike]], strict: bool=True, **kwargs):

The request concerns the from_pretrained entry point and added layers in the UNet class. Start by tracing how from_pretrained loads the UNet, then verify that the requested strict option supports the zerosft ControlNet use case while preserving the normal loading path.

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