[202412] Fix setup_interfaces fixture and related bgp tests for v6 topo#941

r12f merged 1 commit intoAzure:202412Azure/sonic-mgmt.msft:202412from

markx-arista:fix-setup-interfaces-for-bgp-tests-v6-topomarkx-arista/sonic-mgmt.msft:fix-setup-interfaces-for-bgp-tests-v6-topoCopy head branch name to clipboard