feat/bug: deleting a cluster doesn't reset non-IPMI servers

[blackliner]

I deleted the Clusters resource, and expected that:

• ✅ all Serverbindings were removed
• ✅ all Servers were marked as Allocated = false
• ✅ all IPMI capable servers were restarted, wiped and shut down
• ❌ all non-IPMI capable servers were restarted, wiped and left in an endless boot cycle
  • instead, the servers were left as they were, completely intact and Talos just stayed in Running mode
  • these 3 servers are proxmox VMs

In the screenshot below one can observe:

• admin@sidero-metal being the management cluster
• admin@cluster-bravo being the workload cluster
• metal04 being the IPMI capable server, reset, wiped, and shutdown (although it shows as Power == on, the server was cycled throug IPMI and then shut down)
• node talos-yop-i9c representing metal04, not being removed from the cluster, and stuck as unavailable
• all other 3 control plane nodes still around and healthy, accessible and not really influenced by the fact that the cluster was deleted
• all 4 previously existing Serverbindings were removed