fix pkv filling according model code

Author: eaidova

optimum/exporters/openvino/model_configs.py

@@ -485,6 +485,12 @@ def patch_model_for_export(
     library_name="transformers",
 )
 class Phi3OpenVINOConfig(PhiOnnxConfig):
+    DUMMY_INPUT_GENERATOR_CLASSES = (
+        MistralDummyPastKeyValuesGenerator,
+    ) + TextDecoderOnnxConfig.DUMMY_INPUT_GENERATOR_CLASSES
+    DUMMY_PKV_GENERATOR_CLASS = MistralDummyPastKeyValuesGenerator
+    NORMALIZED_CONFIG_CLASS = NormalizedTextConfig.with_args(num_key_value_heads="num_key_value_heads", allow_new=True)
+
     def patch_model_for_export(
         self, model: Union["PreTrainedModel", "TFPreTrainedModel"], model_kwargs: Optional[Dict[str, Any]] = None
     ) -> "ModelPatcher":