Store org data in MongoDB to ease pro platform dashboard

[stephanegigandet]

We currently store organization objects in .sto files in the orgs directory.
In addition, we should also store this data in a new "orgs" collection of the "off" database in MongoDB.

This will be useful in particular to create a dashboard for the administrators of the pro platform, with a table that lists all organizations (#9737)

Related code is in lib/ProductOpener/Orgs.pm (see also data.pm and Products.pm at the end of store_product() to see how we store product data in MongoDB).

[john-gom]

Do we need to replicate in MongoDB if we are also going to replicate in off-query too? If we can create redis events with all of the needed data we can hydrate this directly in off-query without the need for MongoDB