[Misc] Add SPDX-FileCopyrightText (#19100)

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

tests/models/multimodal/processing/test_mllama.py

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

tests/models/multimodal/processing/test_phi3v.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Tests for phi3v's multimodal preprocessing kwargs."""
 import pytest
 

tests/models/multimodal/processing/test_phi4mm.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Tests for phi4mm's multimodal preprocessing kwargs."""
 import pytest
 

tests/models/multimodal/processing/test_qwen2_vl.py

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

tests/models/multimodal/processing/test_smolvlm.py

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

tests/models/quantization/test_aqlm.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 import pytest
 
 from tests.quantization.utils import is_quant_method_supported

tests/models/quantization/test_awq.py

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

tests/models/quantization/test_bitblas.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Compare the outputs of a GPTQ model to a bitblas model.
 
 Note: GPTQ and bitblas do not have bitwise correctness.

tests/models/quantization/test_fp8.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 # flake8: noqa
 """Tests fp8 models against ground truth generation

tests/models/quantization/test_gguf.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """
 Tests gguf models against unquantized models generations
 Note: To pass the test, quantization higher than Q4 should be used

tests/models/quantization/test_gptq_bitblas.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Compare the outputs of a GPTQ model to a bitblas model.
 
 Note: GPTQ and bitblas do not have bitwise correctness.

tests/models/quantization/test_gptq_marlin.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Compares the outputs of gptq vs gptq_marlin.
 
 Note: GPTQ and Marlin do not have bitwise correctness.

tests/models/quantization/test_gptq_marlin_24.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 """Compare the outputs of a GPTQ model to a Marlin_24 model.
 
 Note: GPTQ and Marlin_24 do not have bitwise correctness.

tests/models/quantization/test_modelopt.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 # flake8: noqa
 """Tests Model Optimizer fp8 models against ground truth generation

tests/models/quantization/test_mxfp4.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 # flake8: noqa
 """Tests Quark mxfp4 models against ground truth generation
 """

tests/models/quantization/test_nvfp4.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 # flake8: noqa
 """Tests Model Optimizer nvfp4 models against ground truth generation
 Note: these tests will only pass on B200

tests/models/registry.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from collections.abc import Mapping, Set
 from dataclasses import dataclass, field

tests/models/test_initialization.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from unittest.mock import patch
 

tests/models/test_oot_registration.py

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

tests/models/test_registry.py

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