Support OpenSearch 2.0

[dlvenable]

Is your feature request related to a problem? Please describe.

OpenSearch 2.0 is releasing in May. Data Prepper should support OpenSearch 2.0.
https://opensearch.org/blog/partners/2022/02/roadmap-proposal/

Describe the solution you'd like

Verify that OpenSearch 2.0 works as a sink and make any necessary changes.

Tasks

• Remove mapping types #1139 - Data Prepper never used mapping types
• Use OpenSearch constants while still supporting OpenDistro #877 Not needed to support OpenSearch 2.0
• Clean up OpenSearch plugin build #593
• Update to use the opensearch-java client for _bulk requests #1347

[dlvenable]

Data Prepper is using the deprecated master_timeout value:

data-prepper/data-prepper-plugins/opensearch/src/test/java/com/amazon/dataprepper/plugins/sink/opensearch/OpenSearchTests.java

Line 38 in 34dd94b

request.addParameter("master_timeout", "30s");

Per opensearch-project/documentation-website#450, this value will remain available in OpenSearch 2.0.

[dlvenable]

Data Prepper is currently not compatible with OpenSearch.

The bulk request is failing on the assertion below which is in OpenSearch 1.3.1. It currently expects the type to be present, but this was removed along with the removal of mapping types.

https://github.com/opensearch-project/OpenSearch/blob/c4c0672877bf0f787ca857c7c37b775967f93d81/server/src/main/java/org/opensearch/action/DocWriteResponse.java#L140

The snippet below is from the current HEAD of OpenSearch 2.x. It shows that the type is no longer required. (Indeed it is not even a field).

https://github.com/opensearch-project/OpenSearch/blob/ff75b5ffee0ce08894f9670e539c99c5e3ef86b7/server/src/main/java/org/opensearch/action/DocWriteResponse.java#L137-L144

After OpenSearch 2.0.0 RC1 releases, Data Prepper will need to use the 2.0.0 RC1 client. Release task: opensearch-project/opensearch-build#1624