Update Optional[x] -> x | None and Union[x, y] to x | y (#26633)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

tests/vllm_test_utils/vllm_test_utils/blame.py

@@ -5,8 +5,7 @@ import contextlib
 import dataclasses
 import sys
 import traceback
-from collections.abc import Generator
-from typing import Callable
+from collections.abc import Callable, Generator
 
 
 @dataclasses.dataclass

tests/vllm_test_utils/vllm_test_utils/monitor.py

@@ -5,8 +5,8 @@ import contextlib
 import dataclasses
 import sys
 import traceback
-from collections.abc import Generator
-from typing import Callable, Generic, TypeVar
+from collections.abc import Callable, Generator
+from typing import Generic, TypeVar
 
 _T = TypeVar("_T")