PUT /:index should forward the request to Elastic in dual-write scenario

[avelanarius]

The implementation of PUT /:index endpoint in Quesma either routes the request to Elastic or handles it on its own (information from the request is used later in ingest). However, in the dual-write scenario the request should be both sent to Elastic and handled by Quesma internally - currently it's only handled by Quesma internally, which means that the index is not created correctly in Elastic.

[avelanarius]

Note to the assigned person: make sure that other endpoints (maybe PUT /:index/_mapping and others) don't have the same problem.