v0.6.0: Add Ingress VIP support via annotation

Ingress VIP allocation triggered by annotation vip.capi.gorizond.io/ingress-enabled=true

• Creates IPAddressClaim with role: ingress
• Uses separate GlobalInClusterIPPool
• Writes to Cluster.spec.topology.variables[ingressVip]
• Available in ClusterClass as {{ .ingressVip }}

Update metadata.yaml to v0.6.0

Full Changelog: v0.5.0...v0.6.0