Replace Any with Incomplete in distutils (#12842)

stdlib/distutils/log.pyi

@@ -8,6 +8,7 @@ FATAL: Final = 5
 
 class Log:
     def __init__(self, threshold: int = 3) -> None: ...
+    # Arbitrary msg args' type depends on the format method
     def log(self, level: int, msg: str, *args: Any) -> None: ...
     def debug(self, msg: str, *args: Any) -> None: ...
     def info(self, msg: str, *args: Any) -> None: ...