Import Match and Pattern from re, not typing (#8277)

stdlib/unittest/case.pyi

@@ -4,6 +4,7 @@ import unittest.result
 from _typeshed import Self, SupportsDunderGE, SupportsDunderGT, SupportsDunderLE, SupportsDunderLT, SupportsRSub, SupportsSub
 from collections.abc import Callable, Container, Iterable, Mapping, Sequence, Set as AbstractSet
 from contextlib import AbstractContextManager
+from re import Pattern
 from types import TracebackType
 from typing import (
     Any,
@@ -12,7 +13,6 @@ from typing import (
     Generic,
     NamedTuple,
     NoReturn,
-    Pattern,
     Protocol,
     SupportsAbs,
     SupportsRound,