OSPF ASLA Advertisements: Admin Group, Delay Metric, and TE Metric

This feature adds support for advertising application-specific link attributes (ASLAs) in OSPF, including administrative groups, delay metrics, and traffic engineering (TE) metrics. ASLAs enable different link attributes to be associated with specific applications, such as Flexible Algorithms, on the same link. You can use application-specific administrative groups and metrics to support more precise path computation based on application requirements, including latency-sensitive routing, while keeping Flexible Algorithm attributes separate from legacy RSVP traffic-engineering attributes.