Dynamic VRAM unloading fix (#12227)

* mp: fix full dynamic unloading

This was not unloading dynamic models when requesting a full unload via
the unpatch() code path.

This was ok, i your workflow was all dynamic models but fails with big
VRAM leaks if you need to fully unload something for a regular ModelPatcher

It also fices the "unload models" button.

* mm: load models outside of Aimdo Mempool

In dynamic_vram mode, escape the Aimdo mempool and load into the regular
mempool. Use a dummy thread to do it.

comfy/model_patcher.py

@@ -1597,7 +1597,7 @@ class ModelPatcherDynamic(ModelPatcher):
 
         if unpatch_weights:
             self.partially_unload_ram(1e32)
-            self.partially_unload(None)
+            self.partially_unload(None, 1e32)
 
     def partially_load(self, device_to, extra_memory=0, force_patch_weights=False):
         assert not force_patch_weights #See above