Release Load Balancer Operator v1.6.0

Features:

• Support Kubernetes [1.21,1.23], Load Balancer and Ingress Service(a.k.a AKO) 1.7.2, NSX Advanced LoadBalancer [20.1.6,21.1.4].
• Support workload clusters' endpoints VIP network separation, details can be found here.

Enhancements:

• Refactor AKODeploymentConfig <-> Workload Cluster mapping
• Add webhook to validate and failed early on invalid AKODeploymentConfig changes.
• Automatically detect and update AVI controller version

Known issues:

• When inputting the right AVI controller version, the load balancer operator failed to re-init AVI client using the right controller version.
• AKODeploymentConfig webhook checks ServiceEngineGroup with the same name in the whole AVI controller scope instead of the specific cloud scope, it can't allow duplicate names controller-wise for now.