@Override
    public String toString() {
        return "SinkTopicMetricData{"
                + super.toString() + ","
                + "subSinkMetricMap=" + topicSinkMetricMap
                + '}';
    }
register sub sink metrics group from metric state

@param metricState MetricState
inlong-sort/sort-flink/base/src/main/java/org/apache/inlong/sort/base/metric/sub/SinkTopicMetricData.java