Use Final for Constant Literals in the stdlib (#12332)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

stdlib/stat.pyi

@@ -1,7 +1,7 @@
 import sys
 from _stat import *
-from typing import Literal
+from typing import Final
 
 if sys.version_info >= (3, 13):
     # https://github.com/python/cpython/issues/114081#issuecomment-2119017790
-    SF_RESTRICTED: Literal[0x00080000]
+    SF_RESTRICTED: Final = 0x00080000