[BUG] Add "text-chunking processor support in org.opensearch.client.opensearch.ingest.Processor.

[AshwiniKeshavarao]

In the org.opensearch.client.opensearch.ingest.Processor class, it seems there's no constructor for the text chunking processor.
It a must needed processor for ingest pipelines. Can we add this into java client implementation?

[Xtansia]

A pre-requisite for this will be adding the specification for the processor to https://github.com/opensearch-project/opensearch-api-specification and then we can cover it with code generation.