[proposal] runtime hook should support initContainers

[saintube]

What is your proposal:

The runtime hook CPUSetAllocator in the koordlet is responsible for binding CPUs for pods following the scheduling result. However, it ignores the init containers due to historical performance and timeliness issues.

After the native sidecar container feature is introduced to Kubernetes 1.28, init containers of a pod can be long-running if they set restartPolicy as Always.

To properly manage the resources of the sidecar containers, the runtime hooks should reconsider the init containers.

Why is this needed:

Is there a suggested solution, if so, please add it: