tests(mm): another attempt to fix windows ci test issue

Author: psychedelicious

invokeai/backend/util/util.py

@@ -4,6 +4,7 @@
 import re
 import shutil
 import stat
+import sys
 import unicodedata
 from pathlib import Path
 
@@ -91,4 +92,7 @@ def safe_rmtree(path: Path):
 
     See: https://docs.python.org/3/library/shutil.html#rmtree-example
     """
-    shutil.rmtree(path, onexc=remove_readonly)
+    if sys.version_info >= (3, 12):
+        shutil.rmtree(str(path), onexc=remove_readonly)
+    else:
+        shutil.rmtree(str(path), onerror=remove_readonly)