Remove wwctl overlay build --host #1419

Remove the ability to "build" the host overlay with `wwctl overlay
build`. This also obsoletes the `--nodes` flag, which is also removed.

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

CHANGELOG.md

@@ -73,6 +73,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - `wwctl node list --fullall` has been removed
 - `wwctl profile list --fullall` has been removed
 - Remove `wwctl server <start,stop,status,restart,reload>` #508
+- Remove `wwctl overlay build --host` #1419
+- Remove `wwctl overlay build --nodes` #1419
 
 ### Fixed