Fix: align go provider apis with python apis (#16867)

### Summary

As title.

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Co-authored-by: Jin Hai <haijin.chn@gmail.com>
Co-authored-by: Wang Qi <wangq8@outlook.com>

test/testcases/restful_api/test_openai_compatible.py

@@ -241,4 +241,5 @@ def test_openai_compatible_reference_metadata_fields_filter_accepts_array(rest_c
     choice_msg = payload["choices"][0]["message"]
     skip_if_go_proxy_upstream_error(choice_msg)
     assert "reference" in choice_msg, payload
+    print(payload)
     assert isinstance(choice_msg["reference"], list), payload