This commits makes sure that cloudflared starts using the new API
endpoints for managing routes.
Additionally, the delete route operation still allows deleting by CIDR
and VNet but it is being marked as deprecated in favor of specifying the
route ID.
The goal of this change is to make it simpler for the user to delete
routes without specifying Vnet.
João Oliveirinha
Nuno Diegues
Igor Postelnik
Adam Chalmers