[BugFix] Fix test breakages from transformers 4.45 upgrade (#8829)

tests/entrypoints/openai/test_serving_chat.py

@@ -15,6 +15,11 @@ CHAT_TEMPLATE = "Dummy chat template for testing {}"
 BASE_MODEL_PATHS = [BaseModelPath(name=MODEL_NAME, model_path=MODEL_NAME)]
 
 
+@dataclass
+class MockHFConfig:
+    model_type: str = "any"
+
+
 @dataclass
 class MockModelConfig:
     tokenizer = MODEL_NAME
@@ -24,6 +29,7 @@ class MockModelConfig:
     tokenizer_revision = None
     embedding_mode = False
     multimodal_config = MultiModalConfig()
+    hf_config = MockHFConfig()
 
 
 @dataclass