The commit of #468 seems to break the APi pipelines again.

The primary cause of the problem is that "setattr" sections cannot be removed as those extra attributes don't exist in the default ControlNetUnit class defined in sd-webui-controlnet, and "setattr" will add the new attributes (which only exist in the UiControlNet class) to the object in a hacky way. To remove them, there will need to be a change in the sd-webui-control which I don't bother to make right now.

Another bug is that the return of the get_controlnet_units should be cn_units_dataclass (a list of ControlNetUnit) when is_api is True

Now it can also handle the ip-adapter case (which takes a single reference image rather than batch images) together with other control net based on batch frame-wise input