Routing protocols on EVPN-VXLAN overlay IRB interfaces in the default routing instance

Support running routing protocols on Ethernet VPN VXLAN (EVPN-VXLAN) overlay integrated routing and bridging (IRB) interfaces in the IPv4 or IPv6 default routing instance associated with the underlay (default.inet.0 or default.inet6.0), you can set and export a policy with the install-next-hop except overlay-vxlan-interfaces policy qualifier option. The policy configuration prevents routing loops that can happen if the device uses overlay IRB routes for underlay VTEP reachability. To support this use case in releases prior to 22.4R1, you can configure the IRB interface in a routing instance of type vrf instead of in the default routing instance.