Request to update how to get the `residual_bandwidth`

[viniarck]

This is a request to update on how to get the residual_bandwidth to make use of Link's utilization metadata on EP23-2.

The residual_bandwidth can be computed dynamically based on both link.metadata.utilization and link.[endpoint_a|endpoint_b].speed:

• In percent (scale from 0 to 100):

residual_bandwidth = 100 - utilization

• In Gbps:

residual_bandwidth_gbps = speed * 8 * ((100 - utilization) / 100)