[v1] EngineArgs for better config handling for v1 (#10382)

Signed-off-by: rickyx <rickyx@anyscale.com>

vllm/engine/async_llm_engine.py

@@ -680,7 +680,7 @@ class AsyncLLMEngine(EngineClient):
         """Creates an async LLM engine from the engine arguments."""
         # Create the engine configs.
         if engine_config is None:
-            engine_config = engine_args.create_engine_config()
+            engine_config = engine_args.create_engine_config(usage_context)
 
         executor_class = cls._get_executor_cls(engine_config)