[Misc] Add SPDX-FileCopyrightText (#19100)

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

tests/v1/engine/utils.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import random
 from dataclasses import dataclass

tests/v1/entrypoints/conftest.py

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

tests/v1/entrypoints/llm/test_struct_output_generate.py

 # ruff: noqa: E501
 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from __future__ import annotations
 

tests/v1/entrypoints/openai/test_chat_completion.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import openai  # use the official client for correctness check
 import pytest

tests/v1/entrypoints/openai/test_completion.py

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

tests/v1/entrypoints/openai/test_multi_api_servers.py

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

tests/v1/kv_connector/nixl_integration/test_accuracy.py

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

tests/v1/kv_connector/nixl_integration/test_edge_cases.py

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

tests/v1/kv_connector/nixl_integration/toy_proxy_server.py

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

tests/v1/kv_connector/unit/test_multi_connector.py

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

tests/v1/kv_connector/unit/test_nixl_connector.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from vllm.distributed.kv_transfer.kv_connector.v1.nixl_connector import (
     NixlConnectorMetadata)

tests/v1/kv_connector/unit/test_remote_decode_lifecycle.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 import copy
 
 from vllm.v1.outputs import EMPTY_MODEL_RUNNER_OUTPUT

tests/v1/kv_connector/unit/test_remote_prefill_lifecycle.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 import copy
 
 from vllm.v1.outputs import EMPTY_MODEL_RUNNER_OUTPUT

tests/v1/kv_connector/unit/utils.py

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

tests/v1/metrics/test_ray_metrics.py

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

tests/v1/sample/test_logprobs.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import itertools
 from collections.abc import Generator

tests/v1/sample/test_logprobs_e2e.py

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

tests/v1/sample/test_rejection_sampler.py

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

tests/v1/sample/test_sampler.py

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

tests/v1/sample/test_sampling_params_e2e.py

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