[Refactor] [6/N] to simplify the vLLM openai chat_completion serving architecture (#32240)

Signed-off-by: chaunceyjiang <chaunceyjiang@gmail.com>

tests/tool_use/test_tool_choice_required.py

@@ -8,10 +8,10 @@ import pytest
 import regex as re
 from pydantic import TypeAdapter
 
-from vllm.entrypoints.openai.protocol import (
+from vllm.entrypoints.openai.chat_completion.protocol import (
     ChatCompletionToolsParam,
 )
-from vllm.entrypoints.openai.serving_chat import OpenAIServingChat
+from vllm.entrypoints.openai.chat_completion.serving import OpenAIServingChat
 from vllm.tool_parsers.utils import get_json_schema_from_tools
 
 pytestmark = pytest.mark.cpu_test