public void addAutoGauge(AutoGauge autoGauge, String name, String... tags) {
    MetricInfo metricInfo = new MetricInfo(MetricType.AUTO_GAUGE, name, tags);
    autoGauges.put(metricInfo, autoGauge);
  }
Add autoGauge into internal reporter.

@param autoGauge autoGauge
@param name the name of autoGauge
@param tags the tags of autoGauge
iotdb-core/metrics/interface/src/main/java/org/apache/iotdb/metrics/reporter/iotdb/IoTDBInternalReporter.java