Display physical interface names in L2 topology instead of interface alias

L2 topology maps currently display the configured interface alias (such as a firewall nameif value like 'inside') rather than the underlying physical interface name. This makes it difficult to correlate the L2 map with physical cabling and hardware-level troubleshooting, since the alias does not reveal which physical port is in use. This enhancement would allow L2 topology to render the physical interface name (e.g., ge0/1, ge0/2) alongside or in place of the interface alias, without requiring any change to L3 topology behavior. Providing accurate physical interface labeling in L2 maps would improve troubleshooting efficiency and give customers clearer visibility into physical connectivity, particularly for devices that use custom or logical interface naming conventions.