GBP tag propagation using EVPN Type 5 route advertisements

We support group-based policy (GBP) tag propagation using EVPN Type 5 route advertisements of IP prefixes. Switches and routers typically use EVPN Type 5 advertisements for exchanging routes between data centers. Prior to this release, we supported EVPN Type 2 to Type 5 route conversion between data centers, which resulted in /32 IP routes being exchanged instead of IP prefix routes.