tests: Test image operations in smoke test #21154
Description
Currently we test only starting, stopping and deleting cluster, so we don't catch regression like #21103. This makes it harder to contribute and maintain minikube.
We have image tests the functional test but they assume docker daemon and fail on macOS. We can test using minikube cluster and external repo with a tiny image (such as the alpine image).
The image commands do not require kubernetes and are very lightweight, so we can test them in GitHub runners.
Add image tests to the smoke test:
- minikube image load docker.io/library/alpine
- minikube image load image.tar
- minikube image build
- minikube image ls
- minikube image pull
- minikube image push
- minikube image rm
- minikube image save
- minikube image tag