Convergence improvements for EVPN-VPWS

With this feature, the router advertises an EVPN-VPWS route to its neighbor only after it confirms that:

The route has been successfully installed in the forwarding table of the Packet Forwarding Engine.

The route version in the routing information base (RIB) matches the version in the forwarding table.

If there are any acknowledgment errors, the router withdraws the EVPN-VPWS routes from the Packet Forwarding Engine. This ensures that EVPN-VPWS routes are reliably installed in hardware and that the versions are synchronized across the RIB and forwarding table, just as with BGP routes.

By default, required acknowledgment from the PFE prior to advertising the EVPN-VPWS route is automatically enabled. To disable the acknowledgment requirement, include the evpn-vpws-ack-disable statement at the [edit routing-options forwarding-table] hierarchy level. Disabling the acknowledgment requirement only affects new EVPN-VPWS instances and does not impact the network.