[Misc] Add SPDX-FileCopyrightText (#19100)

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

tests/entrypoints/openai/test_oot_registration.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from ...utils import VLLM_PATH, RemoteOpenAIServer
 

tests/entrypoints/openai/test_openai_schema.py

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

tests/entrypoints/openai/test_pooling.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 import base64
 

tests/entrypoints/openai/test_prompt_validation.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 # imports for guided decoding tests
 import openai

tests/entrypoints/openai/test_rerank.py

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

tests/entrypoints/openai/test_return_tokens_as_ids.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 # Separate these tests out from test_completion and test_chat, because they
 # require launching a second server with a different flag. Running both servers

tests/entrypoints/openai/test_root_path.py

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

tests/entrypoints/openai/test_run_batch.py

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

tests/entrypoints/openai/test_score.py

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

tests/entrypoints/openai/test_serving_chat.py

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

tests/entrypoints/openai/test_serving_models.py

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

tests/entrypoints/openai/test_shutdown.py

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

tests/entrypoints/openai/test_sleep.py

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

tests/entrypoints/openai/test_tensorizer_entrypoint.py

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

tests/entrypoints/openai/test_tokenization.py

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

tests/entrypoints/openai/test_transcription_validation.py

 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 # imports for guided decoding tests
 import io

tests/entrypoints/openai/test_truncation.py

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

tests/entrypoints/openai/test_video.py

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

tests/entrypoints/openai/test_vision.py

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

tests/entrypoints/openai/test_vision_embedding.py

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