[FEATURE] Send search request query DSL json directly to search request

Is your feature request related to a problem?

Data Prepper is going to support configurable queries that will utilize the opensearch java client for search requests.

The query DSL is being taken is as a json string, and the opensearch java client does not support passing a Map or json string to pass this query DSL directly.

However, the opensearch java client requires queries to be modeled using the opensearch java client classes

What solution would you like?

An option to pass the search request directly to the SearchRequest class instead of having to model it piece by piece

What alternatives have you considered?

modeling the entirety of a search request in Java in Data Prepper. This does not scale well

Do you have any additional context?

Add any other context or screenshots about the feature request here.

Start by reading the OpenSearch Java client's SearchRequest API and tracing how search requests are currently modeled and sent. Determine where a JSON query DSL string could be accepted directly, and verify that Data Prepper can submit the request without modeling the full query in Java.