config: fix UserWarning: Do not expect file_or_dir on some Python 3.12 and 3.13 point versions

Fix #13910.

Author: bluetech

changelog/13910.bugfix.rst

@@ -0,0 +1 @@
+Fixed `UserWarning: Do not expect file_or_dir` on some earlier Python 3.12 and 3.13 point versions.

src/_pytest/config/argparsing.py

@@ -170,7 +170,7 @@ def parse_known_and_unknown_args(
  arguments, and a list of unknown flag arguments.
  """
  strargs = [os.fspath(x) for x in args]
- if sys.version_info < (3, 12):
+ if sys.version_info < (3, 12, 8) or (3, 13) <= sys.version_info < (3, 13, 1):
  # Older argparse have a bugged parse_known_intermixed_args.
  namespace, unknown = self.optparser.parse_known_args(strargs, namespace)
  assert namespace is not None