Implement Setup KWs for 2-node topology:

resources/libraries/robot/performance/performance_setup.robot:
Set up 2-node performance topology with wrk and DUT's NIC model

resources/libraries/robot/performance/performance_configuration.robot:
Add VLAN Strip Offload switch off between DUTs in 2-node single link topology
Add DPDK bonded ethernet interfaces to DUTs in 2-node single link topology
Add DPDK bonded ethernet interfaces to topology file in 2-node single link topology
Configure '${nr}' guest VMs with dpdk-testpmd connected via vhost-user in 2-node circular topology
Configure '${nr}' guest VMs with dpdk-testpmd-mac connected via vhost-user in 2-node circular topology

resources/libraries/robot/shared/testing_path.robot:
Configure path in double-link 2-node circular topology
Set interfaces in double-link 2-node circular topology up