Add peer groups support for network routes (#1150)

This commit enhances the functionality of the network routes endpoint by introducing a new parameter called `peers_group`. This addition allows users to associate network routes with specific peer groups, simplifying the management and distribution of routes within a network.

management/server/http/api/openapi.yml

@@ -745,9 +745,15 @@ components:
           type: boolean
           example: true
         peer:
-          description: Peer Identifier associated with route
+          description: Peer Identifier associated with route. This property can not be set together with `peer_groups`
           type: string
           example: chacbco6lnnbn6cg5s91
+        peer_groups:
+          description: Peers Group Identifier associated with route. This property can not be set together with `peer`
+          type: array
+          items:
+            type: string
+            example: chacbco6lnnbn6cg5s91
         network:
           description: Network range in CIDR format
           type: string
@@ -773,7 +779,9 @@ components:
         - description
         - network_id
         - enabled
-        - peer
+        # Only one property has to be set
+        #- peer
+        #- peer_groups
         - network
         - metric
         - masquerade