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>

userdocs/quickstart/suse15.rst

@@ -69,12 +69,8 @@ address of your cluster's private network interface:
       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
       systemd name: nfs-server
     container mounts:
       - source: /etc/resolv.conf