Recommended changes from review of #1568

- Make Resources an `interface{}` to support arbitrary yaml
- Remove `wwctl resource` as incompatible with arbitrary yaml
- Revert changes to host overlay templates
- Remove NFS mount options from warewulf.conf
- Replace NFS support / resource prefix with "fstab" resource
- Move resources to profiles
- Migrate warewulf.conf mounts to nodes.conf with `wwctl upgrade`
- Add documentation

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

overlays/host/internal/warewulf.conf

@@ -19,9 +19,5 @@ nfs:
   export paths:
   - path: /home
     export options: rw,sync
-    mount options: defaults
-    mount: true
   - path: /opt
     export options: ro,sync,no_root_squash
-    mount options: defaults
-    mount: false