[ray.serve.llm] Fix release test (ray-project#51258)

Fixes ray-project#51252 ray-project#51251 ray-project#51250

Signed-off-by: Cody Yu <[email protected]>

Author: comaniac

python/ray/llm/_internal/common/utils/__init__.py

@@ -28,6 +28,7 @@
     model_validator,
 )
 
+from ray.llm._internal.common.base_pydantic import BaseModelExtended
 from ray.llm._internal.common.utils.cloud_utils import CloudMirrorConfig
 from ray.llm._internal.utils import try_import
 
@@ -49,7 +50,6 @@
     ErrorResponse,
     ResponseFormatType,
 )
-from ray.llm._internal.common.base_pydantic import BaseModelExtended
 
 transformers = try_import("transformers")