[INLONG-6813][Sort] MetricStateUtils threw NPE when write to es and no dirtyRecordsOut counter

[wangpeix]

Prepare a Pull Request

• Title: [INLONG-6813][Sort] MetricStateUtils threw NPE when write to es and no dirtyRecordsOut counter

• Fixes [Bug][Sort] MetricStateUtils threw NPE when write to es and no dirtyRecordsOut counter #6813

Motivation

Fix metricStateUtils threw NPE when write to es and no dirtyRecordsOut counter.

Modifications

Register a DIRTY counter.

[gong]

@wangpeix https://github.com/apache/inlong/blob/master/inlong-sort/sort-connectors/elasticsearch-base/src/main/java/org/apache/inlong/sort/elasticsearch/table/RowElasticsearchSinkFunction.java and
https://github.com/apache/inlong/blob/master/inlong-sort/sort-connectors/elasticsearch-base/src/main/java/org/apache/inlong/sort/elasticsearch/ElasticsearchSinkBase.java
will register duplication dirty metric, It will lead metric duplication error when set metric reporter.
So I suggest modify MetricStateUtils to add judge null. @EMsnap will update elasticsearch metric computing.

[wangpeix]

@gong thanks, I will optimize it.

[wangpeix]

@gong The code has been optimized, please help me review it again, thanks.