v1.20.4: Kubernetes 1.20!

• Kubernetes: 1.20.4
• Kubelet: moved deprecated --logging-format flag to kubeletconfig
• Kubelet: removed deprecated --experimental-check-node-capabilities-before-mount flag
• ApiServer: added support for compressing rotated audit log files with --audit-log-compress
• ApiServer: added --etcd-healthcheck-timeout flag
• KubeletConfig: topologyManagerScope
• Service Account Token Volume Projection
• FeatureGates: added CustomCPUCFSQuotaPeriod for cpuCFSQuotaPeriod to work
• FeatureGates: added APIServerIdentity
• FeatureGates: added CronJobControllerV2
• FeatureGates: added GracefulNodeShutdown
• FeatureGates: removed ConfigurableFSGroupPolicy
• FeatureGates: removed EndpointSliceProxying