Add Optional to remaining types (#37808)

More Optional typing

Signed-off-by: cyy <cyyever@outlook.com>

tests/models/bridgetower/test_image_processing_bridgetower.py

@@ -41,7 +41,7 @@ class BridgeTowerImageProcessingTester:
         self,
         parent,
         do_resize: bool = True,
-        size: dict[str, int] = None,
+        size: Optional[dict[str, int]] = None,
         size_divisor: int = 32,
         do_rescale: bool = True,
         rescale_factor: Union[int, float] = 1 / 255,

tests/models/patchtsmixer/test_modeling_patchtsmixer.py

@@ -92,12 +92,12 @@ class PatchTSMixerModelTester:
         head_dropout: float = 0.2,
         # forecast related
         prediction_length: int = 16,
-        out_channels: int = None,
+        out_channels: Optional[int] = None,
         # Classification/regression related
         # num_labels: int = 3,
         num_targets: int = 3,
-        output_range: list = None,
-        head_aggregation: str = None,
+        output_range: Optional[list] = None,
+        head_aggregation: Optional[str] = None,
         # Trainer related
         batch_size=13,
         is_training=True,

tests/models/tvp/test_image_processing_tvp.py

@@ -41,12 +41,12 @@ class TvpImageProcessingTester:
         do_resize: bool = True,
         size: dict[str, int] = {"longest_edge": 40},
         do_center_crop: bool = False,
-        crop_size: dict[str, int] = None,
+        crop_size: Optional[dict[str, int]] = None,
         do_rescale: bool = False,
         rescale_factor: Union[int, float] = 1 / 255,
         do_pad: bool = True,
         pad_size: dict[str, int] = {"height": 80, "width": 80},
-        fill: int = None,
+        fill: Optional[int] = None,
         pad_mode: PaddingMode = None,
         do_normalize: bool = True,
         image_mean: Optional[Union[float, list[float]]] = [0.48145466, 0.4578275, 0.40821073],