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/models/multimodal/processing/test_internvl.py

@@ -3,7 +3,6 @@
 """Tests for InternVL's multimodal preprocessing kwargs."""
 
 from collections.abc import Mapping
-from typing import Optional
 
 import pytest
 from PIL import Image
@@ -103,7 +102,7 @@ def test_processor_override(
     size_factors: list[int],
     min_dynamic_patch: int,
     max_dynamic_patch: int,
-    dynamic_image_size: Optional[bool],
+    dynamic_image_size: bool | None,
     kwargs_on_init: bool,
 ):
     mm_processor_kwargs = {