Add ListImages function and image list command

[afbjorklund]

No filters have been implemented yet

Closes #10933

Example output:

$ minikube image ls
k8s.gcr.io/pause:3.2
k8s.gcr.io/kube-scheduler:v1.20.2
k8s.gcr.io/kube-proxy:v1.20.2
k8s.gcr.io/kube-controller-manager:v1.20.2
k8s.gcr.io/kube-apiserver:v1.20.2
k8s.gcr.io/etcd:3.4.13-0
k8s.gcr.io/coredns:1.7.0
gcr.io/k8s-minikube/storage-provisioner:v5
docker.io/library/busybox:latest
docker.io/library/alpine:latest
docker.io/kubernetesui/metrics-scraper:v1.0.4
docker.io/kubernetesui/dashboard:v2.1.0

[medyagh]

great handy feature ! thank you I would like to see TODO issue to add integraiton test in follow up PRs
and also I would like to see JSON output

since I could envision this be used by embdeded use..why not have --output=json like other commands we have ?

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[afbjorklund]

and also I would like to see JSON output

That can be added, but then you would have to use different commands and add some parsing and re-formatting for each ?

[medyagh]

and also I would like to see JSON output

That can be added, but then you would have to use different commands and add some parsing and re-formatting for each ?

like this

minikube image ls --output=json