Add ability to pass pipeline param to Elasticsearch connector

[aag6z]

Is your feature request related to a problem? Please describe.
Elasticsearch has the ability to transform data as its ingested via ingest pipelines. They need to be passed in as a param to the bulk API. https://www.elastic.co/guide/en/elasticsearch/reference/current/ingest.html

Describe the solution you'd like
Build a pipeline param into the connector to pass in an ingest pipeline

[MthwRobinson]

Thanks @aag6z - we'll take a closer look at the docs you linked and follow up from there.