message: dubbo: fix segfault in filter initialization
  Description:
  Fixes send a dubbo request to envoy (using dubbo filter) , which will cause envoy segmentation fault (core dumped).
  Risk Level: low (extension only)
diff: @@ -16,10 +16,14 @@ Network::FilterFactoryCb DubboProxyFilterConfigFactory::createFilterFactoryFromP
  const std::string stat_prefix = fmt::format("dubbo.{}.", proto_config.stat_prefix());
  - return [stat_prefix, &proto_config, &context](Network::FilterManager& filter_manager) -> void {
  - filter_manager.addFilter(std::make_shared<Filter>(
  - stat_prefix, proto_config.protocol_type(), proto_config.serialization_type(),
  - context.scope(), context.dispatcher().timeSource()));
  + Filter::ConfigProtocolType protocol_type = proto_config.protocol_type();
  + Filter::ConfigSerializationType serialization_type = proto_config.serialization_type();
  +
  + return [stat_prefix, protocol_type, serialization_type,
  + &context](Network::FilterManager& filter_manager) -> void {
  + filter_manager.addFilter(std::make_shared<Filter>(stat_prefix, protocol_type,
  + serialization_type, context.scope(),
  + context.dispatcher().timeSource()));
  };
  }
  