DocumentSourceInternalSearchMongotRemote is the class currently used for all
communication with mongot during query processing.

All possible commands (originating from a $serach / $searchMeta / $vectorSearch) turn into an executor::RemoteCommandRequest through the getRemoteCommandForSearchQuery() function, which doesn't not clearly define the command structure, but rather just modifies BSON ad-hoc.

Define one or more types of IDL structures to clearly define what these command(s) should look like, and then use the C++ bindings to construct these requests when sending to mongot.

Also, once this works on the mongod side, we should file a ticket with the search team to use the same bindings in Java on their side.