cri: Add API for saving an image to a local path

[afbjorklund]

This function SaveImage is the opposite of LoadImage,
useful for saving built images to the cache directory.

This is an alternative to using the push functionality,
which requires a registry (similar to the pull function).

For #11130

[medyagh]

/ok-to-test

[minikube-pr-bot]

kvm2 driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 11128) |
+----------------+----------+---------------------+
| minikube start | 50.5s    | 49.5s               |
| enable ingress | 35.2s    | 35.0s               |
+----------------+----------+---------------------+

Times for minikube start: 53.2s 47.1s 49.2s 52.1s 51.0s
Times for minikube (PR 11128) start: 51.3s 46.1s 53.8s 47.2s 49.2s

Times for minikube ingress: 36.4s 35.3s 34.3s 36.4s 33.8s
Times for minikube (PR 11128) ingress: 33.8s 34.3s 35.2s 34.3s 37.4s

docker driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 11128) |
+----------------+----------+---------------------+
| minikube start | 21.8s    | 21.1s               |
| enable ingress | 30.0s    | 29.7s               |
+----------------+----------+---------------------+

Times for minikube ingress: 31.0s 28.5s 28.5s 29.0s 33.0s
Times for minikube (PR 11128) ingress: 29.5s 32.0s 28.5s 29.0s 29.5s

Times for minikube start: 22.2s 21.2s 22.7s 21.4s 21.4s
Times for minikube (PR 11128) start: 20.7s 21.7s 21.0s 20.7s 21.4s

docker driver with containerd runtime
error collecting results for docker driver: timing run 0 with minikube: timing cmd: [out/minikube addons enable ingress]: waiting for minikube: exit status 10

[medyagh]

Looks good to me

[k8s-ci-robot]

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