Enable L2Border and L3Border Options for Traditional Devices in DVT

NetBrain currently restricts the IsL2Border and IsL3Border configuration options within DVT to logical node device types, leaving these options unavailable when a traditional device is selected. This enhancement would extend the availability of the IsL2Border and IsL3Border options to traditional devices, aligning their configuration capability with logical nodes. Providing consistent access to these border designation options across both device types would support more accurate and flexible topology modeling in DVT-based workflows.