Create a tool to recover cluster console after scaling machine sets to 0

[m1kola]

Web console is unavailable after scaling worker machine sets to 0. This happens becasue by default router pods are deployed on workers.

It creates a tricky situation for users who scaled machine sets via web console and do not have a valid kubeconfig locally to make changes via CLI.

SREs will be able to manually recover user clusters from this state, but it requires a long-term solution.

[jim-minter]

enabling the admin kubeconfig to be retrieved by the list-credentials api would probably significantly help this.