Add ability to Disable the kubelet read-only port in GKE clusters and Node Pools

[PurseChicken]

Checklist

• I did not find a related open enhancement request.
• I understand that enhancement requests filed in the GitHub repository are by default low priority.
• If this request is time-sensitive, I have submitted a corresponding issue with GCP support.

Describe the feature or resource

Google is sending out notifications to disable the insecure unauthenticated port in the kubelet server. This includes modifying both the Cluster and Node Pool configuration.

This is currently a manual process as there does not appear to be an ability to do this directly with the ContainerCluster or ContainerNodePool config connector resources.

Additional information

https://cloud.google.com/kubernetes-engine/docs/how-to/disable-kubelet-readonly-port

I imagine we will want to extend the nodePoolDefaults.nodeConfigDefaults section of ContainerCluster to include 'insecureKubeletReadonlyPortEnabled' (boolean)
E.G.

nodePoolDefaults:
  nodeConfigDefaults:
    gcfsConfig:
      enabled: boolean
    loggingVariant: string
    insecureKubeletReadonlyPortEnabled: boolean

Additionally, modify nodeConfig.kubeletConfig section of ContainerNodePool to include 'insecureKubeletReadonlyPortEnabled' (boolean)
E.G.

nodeConfig:
  kubeletConfig:
    cpuCfsQuota: boolean
    cpuCfsQuotaPeriod: string
    cpuManagerPolicy: string
    podPidsLimit: integer
    insecureKubeletReadonlyPortEnabled: boolean

Finally, for autopilot clusters, modify nodePoolAutoConfig to include \ control nodeKubeletConfig and be able to set 'insecureKubeletReadonlyPortEnabled' (boolean) within ContainerCluster
E.G.

nodePoolAutoConfig:
  networkTags:
    tags:
    - string
  nodeKubeletConfig:
    insecureKubeletReadonlyPortEnabled: boolean

Importance

I imagine that as more and more users get instruction to disable this insecure configuration, there will be more users that will want this capability using config-connector. In my opinion this should be considered a medium urgency.