Disable Mixtral `output_router_logits` during inference (#29249)

* Set output_router_logits=False in prepare_inputs_for_generation for mixtral

* Add output_router_logits=False to prepare_inputs_for_generation for mixtral

* Fix style

src/transformers/models/mixtral/modeling_mixtral.py

@@ -1415,7 +1415,13 @@ class MixtralForCausalLM(MixtralPreTrainedModel):
         )
 
     def prepare_inputs_for_generation(
-        self, input_ids, past_key_values=None, attention_mask=None, inputs_embeds=None, **kwargs
+        self,
+        input_ids,
+        past_key_values=None,
+        attention_mask=None,
+        inputs_embeds=None,
+        output_router_logits=False,
+        **kwargs,
     ):
         # Omit tokens covered by past_key_values
         if past_key_values is not None:
@@ -1467,6 +1473,7 @@ class MixtralForCausalLM(MixtralPreTrainedModel):
                 "past_key_values": past_key_values,
                 "use_cache": kwargs.get("use_cache"),
                 "attention_mask": attention_mask,
+                "output_router_logits": output_router_logits,
             }
         )
         return model_inputs