[Misc] Add SPDX-FileCopyrightText (#19100)

Signed-off-by: simon-mo <simon.mo@hey.com>

tests/models/multimodal/generation/test_whisper.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 from typing import Optional
 
 import pytest

tests/models/multimodal/generation/vlm_utils/builders.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Helpers for building inputs that can be leveraged for different test types.
 """
 from collections.abc import Iterable

tests/models/multimodal/generation/vlm_utils/case_filtering.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Utils for determining which subset of model tests belong to a specific
 modality, getting all combinations (similar to pytest's parametrization),
 handling multimodal placeholder substitution, and so on.

tests/models/multimodal/generation/vlm_utils/core.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Core test implementation to be shared across modalities."""
 from typing import Any, Callable, Optional
 

tests/models/multimodal/generation/vlm_utils/custom_inputs.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Custom input builders for edge-cases in different models."""
 from io import BytesIO
 from typing import Callable

tests/models/multimodal/generation/vlm_utils/model_utils.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Common utility functions relating to different models that are useful
 for manipulating the input / output of HF & vLLM test runners, which are
 typically specific to a small subset of models.

tests/models/multimodal/generation/vlm_utils/runners.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Entrypoints for wrapping the core run_test implementation for specific test
 types / modalities.
 """

tests/models/multimodal/generation/vlm_utils/types.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Types for writing multimodal model tests."""
 from collections.abc import Iterable
 from enum import Enum

tests/models/multimodal/pooling/test_dse_qwen2_vl.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from typing import Callable
 

tests/models/multimodal/pooling/test_intern_vit.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 import pytest
 import torch
 import torch.nn as nn

tests/models/multimodal/pooling/test_llava_next.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import pytest
 import torch.nn.functional as F

tests/models/multimodal/pooling/test_phi3v.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import pytest
 import torch.nn.functional as F

tests/models/multimodal/processing/test_common.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from functools import partial
 from typing import Optional, Union

tests/models/multimodal/processing/test_h2ovl.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Tests for H2OVL's multimodal preprocessing kwargs."""
 from collections.abc import Mapping
 from typing import Optional

tests/models/multimodal/processing/test_idefics3.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Tests for Idefics3's multimodal preprocessing kwargs."""
 import pytest
 from transformers import Idefics3Config

tests/models/multimodal/processing/test_internvl.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Tests for InternVL's multimodal preprocessing kwargs."""
 from collections.abc import Mapping
 from typing import Optional

tests/models/multimodal/processing/test_llama4.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Tests for Llama4's multimodal preprocessing kwargs."""
 
 import pytest

tests/models/multimodal/processing/test_llava_next.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import itertools
 from functools import partial

tests/models/multimodal/processing/test_llava_onevision.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import itertools
 from functools import partial

tests/models/multimodal/processing/test_minimax_vl_01.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import pytest
 from PIL import Image