`WasmCloudHostConfig` should have a status that indicates if it can't scale all the way

I was running in GKE in autopilot mode and only 1 node had spun up. Even though I had requested 2 replicas in daemonset mode, it only gave me one (which makes sense). However, we should probably have some sort of indicator for when nodes are full or otherwise unavailable that the number of hosts desired is not possible.

This is really low priority, was just pointing it out since I discovered it