Add a query parameter to fetch multiple investigations by id

Currently, when looking at a group of parcels in the front-end (My Parcels page), we fetch all investigations and do a find to find the investigations of parcels.

Instead, it would more performant to be able to fetch only the investigations we need. We could get the investigationIds from the parcels and then launch a request of the type: /whatever/investigations?ids=[...].

@demariaa You are refactoring investigations' endpoint. Do you think it would be feasible ?