Today it is possible to pass the full trunk into the workload by using the `other_config : vlan-passthru` logical switch option (a boolean).

Still, we'd like to have better granularity: we need to be able to specify which VLAN tags trickle down to a specific workload.

Other projects have come up w/ a similar APIs:

• bridge CNI: https://www.cni.dev/plugins/current/main/bridge/#example-l2-only-vlan-configuration
• OVS CNI: https://github.com/k8snetworkplumbingwg/ovs-cni/blob/main/docs/cni-plugin.md#example-configuration
• nmstate: https://nmstate.io/kubernetes-nmstate/examples.html#linux-bridge