dracut.ipxe boots an initramfs detected in the container image. This
required a few small changes to warewulfd and the wwinit overlay to
accommodate the dracut initramfs configuring the network interface
before wwinit:
- Include .NetDevs in the ipxe configuration template, so that dracut
can configure interfaces with the correct names.
- Configure NetworkManager to not keep the initramfs configuration, in
stead applying the configuration found by wwinit.
Signed-off-by: Jonathon Anderson <janderson@ciq.com>