Ensure `ksail down <name-of-cluster> --delete-pull-through-registries` removes all registries

[devantler]

Description of the bug

❯ docker ps
CONTAINER ID   IMAGE        COMMAND                  CREATED          STATUS          PORTS                                       NAMES
f9d00dfff67c   registry:2   "/entrypoint.sh /etc…"   53 minutes ago   Up 53 minutes   0.0.0.0:5050->5000/tcp, :::5050->5000/tcp   manifests
cc575a85a88d   registry:2   "/entrypoint.sh /etc…"   53 minutes ago   Up 53 minutes   0.0.0.0:5006->5000/tcp, :::5006->5000/tcp   proxy-mcr.microsoft.com
22186ec73ed7   registry:2   "/entrypoint.sh /etc…"   53 minutes ago   Up 53 minutes   0.0.0.0:5005->5000/tcp, :::5005->5000/tcp   proxy-quay.io
f7a78b429d66   registry:2   "/entrypoint.sh /etc…"   54 minutes ago   Up 53 minutes   0.0.0.0:5004->5000/tcp, :::5004->5000/tcp   proxy-ghcr.io
18e09ebf3dc0   registry:2   "/entrypoint.sh /etc…"   54 minutes ago   Up 54 minutes   0.0.0.0:5003->5000/tcp, :::5003->5000/tcp   proxy-gcr.io
e6f1e8e42b1a   registry:2   "/entrypoint.sh /etc…"   54 minutes ago   Up 54 minutes   0.0.0.0:5002->5000/tcp, :::5002->5000/tcp   proxy-registry.k8s.io
8bbc369253ae   registry:2   "/entrypoint.sh /etc…"   54 minutes ago   Up 54 minutes   0.0.0.0:5001->5000/tcp, :::5001->5000/tcp   proxy-docker.io

❯ ksail down <name-of-registry> --delete-pull-through-registries
INFO[0000] No clusters found

❯ docker ps
CONTAINER ID   IMAGE        COMMAND                  CREATED             STATUS             PORTS                                       NAMES
f9d00dfff67c   registry:2   "/entrypoint.sh /etc…"   About an hour ago   Up About an hour   0.0.0.0:5050->5000/tcp, :::5050->5000/tcp   manifests