UPSERT mode for DELETE operation not send external version

[ramyogi7283]

Problem

When UPSERT mode DELETE still sends the version s external that is causing issue. ELASTIC index snapshot and restore to different environment where Kafka offset values are not same as incremental from snapshot index this external versioning creates problem for DELETE operations even we changes write.method=UPSERT. https://github.com/confluentinc/kafka-connect-elasticsearch/issues/709

Solution

DELETE operation needs to send version external or not based upon the INSERT vs UPSERT method.

Does this solution apply anywhere else?

• [ ] yes
• [ x ] no

If yes, where?

Test Strategy

Testing done:

• [ ] Unit tests
• [ ] Integration tests
• [ ] System tests
• [x] Manual tests

Release Plan

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