RKE2/baremetal: chicken vs egg issue around VIP availability

@rletrocquer has uncovered a 🐔/🥚 issue today when deploying RKE2 on baremetal:

• we need to use registrationAddress because we had multiple NICs
• we point registrationAddress to the cluster VIP
• the VIP isn't available until MetalLB is ready
• MetalLB needs Calico to be ready (tigera operator)
• both Calico and MetaLB need to talk to k8s API
• k8s API is also set to be the VIP... which isn't available until MetalLB is ready