fix bug in asr_inference_paraformer_vad_punc and support without punc model

lzr265946

2023-02-08 5db5950e0735783a8b1c3b5278868b75dd8556a7

 funasr/runtime/python/grpc/grpc_main_server.py

@@ -1,8 +1,9 @@
import grpc
from concurrent import futures
import argparse

import paraformer_pb2_grpc
from grpc_server import ASRServicer
import grpc
import argparse

def serve(args):
      server = grpc.server(futures.ThreadPoolExecutor(max_workers=10),