Pod-Level Resource Managers

This KEP proposes extending the Kubelet's Topology, CPU, and Memory Managers to support pod-level resource specifications. This enhancement evolves the resource managers from a strictly per-container allocation model to a pod-centric one, that enables them to use pod.spec.resources to perform NUMA alignment for the pod as a whole, and introduces a partitioning scheme to manage resources for containers within that pod-level grouping. This change introduces a more flexible and powerful resource management model, particularly for performance-sensitive workloads.