[Elasticsearch Connector] Support Ent-Search ES Proxy API

[joemcelroy]

Support Ent-search feature which has the ability to execute ES queries through ent-search. More information about the API here

Example

const connector = new ElasticsearchAPIConnector({
  host: "<my-elasticsearch-host>",
  apiKey: "<api-key>",
  engine: "my-example-movies"
});

When engine is specified, assume its a proxy search DSL through to enterprise-search. Modify the body of the request with the query envelope of request and specify query_params rather than size.

[botelastic[bot]]

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