1. add new registry api under resources.kubesphere.io/v1alpha3
2. deprecate registry api v1alpha2
Registry API v1alpha2 uses docker client to authenticate image registry
secret, which depends on docker.sock. We used to mount host
`/var/run/docker.sock` to deployment. It will prevent us imgrating to
containerd since no `docker.sock` exists. Registry API v1alpha3 comes to
rescure, it wraps library go-containerregistry and compatible with
docker registry, Harbor etc.
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