private int getDataTimeIndex(String[] fieldNames) {
        for (int i = 0; i < fieldNames.length; i++) {
            if (AUDIT_DATA_TIME.equalsIgnoreCase(fieldNames[i])) {
                return i;
            }
        }
        return DATA_TIME_ABSENT_INDEX;
    }
get the index of AUDIT_DATA_TIME in fieldNames
@param fieldNames
@return index of AUDIT_DATA_TIME in fieldNames, or DATA_TIME_ABSENT_INDEX if absent
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/starrocks/src/main/java/org/apache/inlong/sort/starrocks/table/sink/utils/SchemaUtils.java