HorizontalPodAutoscaler ContainerResource type metric moves to beta

Kubernetes 1.27 enables the ContainerResource type metric feature in beta, which allows for autoscaling based on the resource usage of individual containers in a pod.

This differs from the previously available Resource type metric, which calculates the average utilization of all containers in a pod.

The new feature,managed by SIG Autoscaling, provides more accurate scaling for pods with multiple containers, some of which may not show direct correlation between their resource usage and the overall pod utilization.

It also improves the HPA controller's observability by exposing metrics for performance monitoring.