[suggestion] support for labeling node with several pools

[migs35323]

Not sure if this is already implemented, the k3s documentation only mentions one pool per node
but it would be cool to attribute a node to be available in several pools

example: svccontroller.k3s.cattle.io/lbpool='["pool1","pool2"]' || svccontroller.k3s.cattle.io/lbpool='pool1,pool2'

would that be possible?

i have made pools based on what should be exposed on specific nodes,
one node can expose several load balancer serviçes, while other nodes only expose some...
i made affinity so my load balancer workloads schedule on specific svccontroller.k3s.cattle.io/lbpool labeled pods, so it matches the externalTrafficPolicy: Local policy