OpenSearch Sink add support for sending pipeline parameter in BulkRequest

[sb2k16]

Description

In order for OpenSearch API source to support URL parameter pipeline for the Document API Bulk, the OpenSearch sink needs to be able to read the pipeline parameter received in the event and then send it to OpenSearch on Bulk API request. This pull request is intended to add support in OpenSearch sink to do the following:

• Read pipeline config from the pipeline sink configuration
• Set the value in the BulkRequest if received in the data prepper event
  • Support added for create and index actions

Example pipeline configuration to support this:

version: "2"
opensearch-api-pipeline:
  source:
    ...
  sink:
    - opensearch:
        ...
        pipeline: "${getMetadata(\"my-pipeline-metadata\")}"
        ...

Issues Resolved

Contributes to #248

Check List

• [X ] New functionality includes testing.
• New functionality has a documentation issue. Please link to it in this PR.
  • New functionality has javadoc added
• [ X] Commits are signed with a real name per the DCO

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[dlvenable]

Thanks @sb2k16 ! This will be a helpful feature for users!

Looks like some integration tests are failing

[kkondaka]

@sb2k16 DCO check is failing