[BugFix] fix num_lookahead_slots missing in async executor (#4165)

Co-authored-by: Lei Wen <wenlei03@qiyi.com>

vllm/executor/neuron_executor.py

@@ -84,6 +84,7 @@ class NeuronExecutorAsync(NeuronExecutor, ExecutorAsyncBase):
         blocks_to_swap_in: Dict[int, int],
         blocks_to_swap_out: Dict[int, int],
         blocks_to_copy: Dict[int, List[int]],
+        num_lookahead_slots: int,
     ) -> List[SamplerOutput]:
         output = await make_async(self.driver_worker.execute_model)(
             seq_group_metadata_list=seq_group_metadata_list, )