Move kubernetes/master to kubernetes/control-plane (#7218)

...es/control-plane/templates/apiserver-audit-policy.yaml.j2

...ol-plane/templates/apiserver-audit-webhook-config.yaml.j2

...es/control-plane/templates/kubeadm-config.v1beta2.yaml.j2

...trol-plane/templates/kubeadm-controlplane.v1beta2.yaml.j2

...rnetes/control-plane/templates/secrets_encryption.yaml.j2

...trol-plane/templates/webhook-authorization-config.yaml.j2

...control-plane/templates/webhook-token-auth-config.yaml.j2

upgrade-cluster.yml