[Refactor] Pass full VllmConfig to Renderer (#34485)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

tests/entrypoints/openai/test_completion_error.py

@@ -58,6 +58,11 @@ class MockModelConfig:
         return self.diff_sampling_param or {}
 
 
+@dataclass
+class MockVllmConfig:
+    model_config: MockModelConfig
+
+
 def _build_serving_completion(engine: AsyncLLM) -> OpenAIServingCompletion:
     models = OpenAIServingModels(
         engine_client=engine,
@@ -74,7 +79,7 @@ def _build_renderer(model_config: MockModelConfig):
     _, tokenizer_name, _, kwargs = tokenizer_args_from_config(model_config)
 
     return HfRenderer(
-        model_config,
+        MockVllmConfig(model_config),
         tokenizer_kwargs={**kwargs, "tokenizer_name": tokenizer_name},
     )