Use PEP 604 syntax wherever possible (#7493)

stdlib/time.pyi

@@ -1,6 +1,6 @@
 import sys
 from _typeshed import structseq
-from typing import Any, Protocol, Union
+from typing import Any, Protocol
 from typing_extensions import Literal, final
 
 _TimeTuple = tuple[int, int, int, int, int, int, int, int, int]
@@ -37,7 +37,7 @@ if sys.version_info >= (3, 9) and sys.platform == "linux":
 # even if an iterable with length >9 is passed.
 # https://github.com/python/typeshed/pull/6560#discussion_r767162532
 @final
-class struct_time(structseq[Union[Any, int]], _TimeTuple):
+class struct_time(structseq[Any | int], _TimeTuple):
     @property
     def tm_year(self) -> int: ...
     @property