Support for Qwen Diffsynth Controlnets canny and depth. (#9465)

These are not real controlnets but actually a patch on the model so they
will be treated as such.

Put them in the models/model_patches/ folder.

Use the new ModelPatchLoader and QwenImageDiffsynthControlnet nodes.

nodes.py

@@ -2322,6 +2322,7 @@ async def init_builtin_extra_nodes():
         "nodes_tcfg.py",
         "nodes_context_windows.py",
         "nodes_qwen.py",
+        "nodes_model_patch.py"
     ]
 
     import_failed = []