Avoid retry when deletes non exists visibility message

[neil-xie]

What changed?
Check if GenericBulkableRequest is delete request to avoid retry during migration

Why?
This can happen during migration from ES to OS.
The doc can be deleted during double writes, but it doesn't exist in the destination source, it will nack the kafka message and keep retrying

How did you test it?
Unit test
Tested in dev manually

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

Attention: Patch coverage is 76.47059% with 4 lines in your changes missing coverage. Please review.

Project coverage is 73.06%. Comparing base (1b02d78) to head (efa3133).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
service/worker/indexer/esProcessor.go	76.47%	3 Missing and 1 partial ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
service/worker/indexer/esProcessor.go	74.19% <76.47%> (+0.66%)	⬆️

... and 8 files with indirect coverage changes

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