Made MultiGPU Work Units node more robust by forcing ModelPatcher clones to match at sample time, reuse loaded MultiGPU clones, finalize MultiGPU Work Units node ID and name, small refactors/cleanup of logging and multigpu-related code

comfy/patcher_extension.py

@@ -3,6 +3,8 @@ from typing import Callable
 
 class CallbacksMP:
     ON_CLONE = "on_clone"
+    ON_DEEPCLONE_MULTIGPU = "on_deepclone_multigpu"
+    ON_MATCH_MULTIGPU_CLONES = "on_match_multigpu_clones"
     ON_LOAD = "on_load_after"
     ON_DETACH = "on_detach_after"
     ON_CLEANUP = "on_cleanup"