Enhance CRI to fix kubelet image garbage collection

This story is a follow-up on RFE-4608, which proposes to enhance the CRI to include the required information to fix the reverted behavior in CRI-O:

• https://github.com/cri-o/cri-o/pull/7763
• https://github.com/cri-o/cri-o/pull/7762

Requirements:

• The pod API will be untouched, but the CRI will be extended to carry an image ID as well as image digest (ref) (for CreateContainer / ListContainers RPCs), where the ID can be used for the kubelet image garbage collection and the digest for the pod API.
• The whole change needs to be backwards compatibility. This means if the new field is not set, then it should reflect the current behavior.