Convert list/tuple of `HunyuanDiT2DControlNetModel` to `HunyuanDiT2DMultiControlNetModel` (#9651)

Convert list/tuple of HunyuanDiT2DControlNetModel to HunyuanDiT2DMultiControlNetModel
Co-authored-by: YiYi Xu <yixu310@gmail.com>

src/diffusers/pipelines/controlnet_hunyuandit/pipeline_hunyuandit_controlnet.py

@@ -225,6 +225,8 @@ class HunyuanDiTControlNetPipeline(DiffusionPipeline):
         requires_safety_checker: bool = True,
     ):
         super().__init__()
+        if isinstance(controlnet, (list, tuple)):
+            controlnet = HunyuanDiT2DMultiControlNetModel(controlnet)
 
         self.register_modules(
             vae=vae,