[ci]loose voxcpm2 HNR baseline (#4801)

Signed-off-by: CHEN <116010019@link.cuhk.edu.cn>

tests/e2e/online_serving/test_voxcpm2_tts_expansion.py

@@ -74,7 +74,6 @@ def test_voice_clone_streaming_001(omni_server, openai_client) -> None:
 
 @hardware_test(res={"cuda": "L4"}, num_cards=1)
 @pytest.mark.parametrize("omni_server", tts_server_params, indirect=True)
-@pytest.mark.skip(reason="#4335")
 def test_response_format_001(omni_server, openai_client) -> None:
     """
     Test voice-clone non-stream PCM output via OpenAI API.
@@ -93,5 +92,6 @@ def test_response_format_001(omni_server, openai_client) -> None:
         "voice": "default",
         "ref_audio": REF_AUDIO_URL,
         "min_audio_bytes": _MIN_AUDIO_BYTES,
+        "min_hnr_db": -2.0,
     }
     openai_client.send_audio_speech_request(request_config)