CreateBootstrapConfigMapIfNotExists creates the kube-public ConfigMap if it doesn't exist already.

CreateClusterInfoRBACRules creates the RBAC rules for exposing the cluster-info ConfigMap in the kube-public namespace to unauthenticated users.

BootstrapSignerClusterRoleName sets the name for the ClusterRole that allows access to ConfigMaps in the kube-public ns.