[Integration] Send site+submission data to external API on upload

[rfontanarosa]

To enhance Ground's interoperability and enable seamless data flow with other applications, we propose implementing a mechanism to send collected data to external systems via an API at collection time.

This integration should be flexible and configurable, similar to the existing integration with WHISP for propertyGenerators. A generic configuration for each integration should be stored in Firestore.

This probably should be linked to this issue #1537.

A detailed proposal from @vittorino is required to further define the technical implementation and design of this feature.

The main problem is the visibility of these integrations. maybe we list the integration using a sort of integration ACL?

[kenstershiro]

Gregory Sampson, from WTO ITC (solution architect for the DFTG (Deforestation Free Trade Gateway)) has asked for WHISP integration for LOIs needed in order to pay farmers to collect data, and import the data automatically from Ground, triggering a call to their api. There is a use case needed by Feb.
Will need to manage the status of uploads and have a way to check which ones have been uploaded.
Ensure that the solution is as generic as possible for integrations.

[kenstershiro]

Proposal to consider in the PM Monthly - build directly a POC in the openforis-ground to get something out quicker.

[kenstershiro]

Should be able to use existing integration UI, just another option to toggle on or off.
Needs edit mode - @vittorino
Also needs way to specify which jobs have this enabled or not. See related task for geojson export