Add support for triggering dataset export in destinatons

[Charles Menguy]

This functionality is being built internally right now, and once it is available we would like to update the destination module to trigger on-demand dataset exports.

Right now the call to create a destination just takes a raw dictionary destinationObj: dict but it would be nice to actually be able to programmatically pass just a dataset_id: str and not having to deal with complicated payloads.

[Julien]

Assigning this to you @cmenguy as you seem to know this new functionality.
If you can not amend this and wish for me to take over, we will need to wait till documentation is available on that feature.
I do not have access to beta feature (yet).