SRLG link constraint in FAD and delay

This feature supports delay normalization and Flexible Algorithm Definition (FAD) defined constraints related to admin-groups and shared risk link group (SRLG) as defined in RFC 9350, IGP Flexible Algorithm. During flexible algorithm computation, when the measured latency values are not equal and the difference is insignificant, IS-IS advertises this slightly higher latency value as a metric. IS-IS uses this normalized latency delay value instead of the measured delay value.