Is your feature request related to a problem? Please describe.

During investigation on issue with performing a HA cluster DR using k0sctl, I've faced the need to update etcd member peerURL to allow joining CP nodes to the first replica without issues. Default etcd member peerURL was incorrect, and pointed to a node from the old etcd cluster.

This is possible to do using etcdctl, yet it requires to have external dependency.

Describe the solution you would like

Add k0s etcd member-update subcommand, allowing to change any member peerURL on any architecture without bringing external dependencies, such as etcdctl tool.

Describe alternatives you've considered

Using etcdctl tool directly works as well, yet it was needed to install it on the node first. It seems to impractical, since k0s etcd subcommand already allows member to leave or be listed.

ETCDCTL_API=3 etcdctl \
  --endpoints=https://127.0.0.1:2379 \
  --cert=/var/lib/k0s/pki/etcd/server.crt \
  --key=/var/lib/k0s/pki/etcd/server.key \
  --cacert=/var/lib/k0s/pki/etcd/ca.crt \
  member update <meber-id> --peer-urls=https://<nodePrivateIP>:2380

Additional context

No response