public void setInLongMetric(String inlongMetric) {
            this.inlongMetric = inlongMetric;
        }
set InLongMetric for reporting metrics

@param inlongMetric
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/elasticsearch-7/src/main/java/org/apache/inlong/sort/elasticsearch7/ElasticsearchSink.java