Automatic merge from submit-queue

Kubelet: add SyncPod for new runtime API

This PR adds implements of `SyncPod` for new runtime API. Note that init containers is not included, it will in another following PR.

**DO-NOT-MERGE**. Based on #31322 and #31395, only last commit is for review.

CC @yujuhong @Random-Liu and @kubernetes/sig-node @kubernetes/sig-rktnetes