Improve path calculation accuracy for Layer 2 QoS on Cisco switches and Viptela devices

NetBrain path calculation logic currently does not correctly account for Layer 2 QoS configuration on certain Cisco switch and Viptela SD-WAN platforms, which can produce a path that does not reflect actual network behavior when QoS policies are applied at Layer 2. This enhancement would update the path calculation parsing logic to correctly recognize and incorporate Layer 2 QoS settings for these device types, ensuring the calculated path reflects real traffic handling. Customers relying on path calculation for QoS-sensitive troubleshooting would gain accurate path visibility, reducing the need for manual verification of QoS behavior outside the tool.