[Merge] ~simpoir/livecd-rootfs/+git/livecd-rootfs:lp2092196-buildd-udev into livecd-rootfs:ubuntu/master

[Simon Poirier]

Simon Poirier has proposed merging ~simpoir/livecd-rootfs/+git/livecd-rootfs:lp2092196-buildd-udev into livecd-rootfs:ubuntu/master.

Commit message:
fix(buildd): add udev to buildd images. (LP: #2092196)

On 24.10 forward, networkd relies on udev for interface setup. This addresses
forever pending interfaces in networkd on buildd lxd images.

Requested reviews:
  Canonical Foundations Team (canonical-foundations)
Related bugs:
  Bug #2092196 in cloud-images: "udev package missing in oracular buildd image"
  https://bugs.launchpad.net/cloud-images/+bug/2092196

For more details, see:
https://code.launchpad.net/~simpoir/livecd-rootfs/+git/livecd-rootfs/+merge/480084

Notably, the current consumers are *craft and LP. snapcraft being the current
driver of this change. I had an exchange with people both to check this change
won't affect them significantly

Testing:
livebuild --project ubuntu-base --subproject buildd

    lxc image import livecd.ubuntu-base.lxd.tar.gz
    img=$(sha256sum livecd.ubuntu-base.lxd.tar.gz|awk '{print $1}')
    lxc launch $img tst
    lxc exec tst tee /etc/systemd/network/lxd.network <<EOF
    [Match]
    Name=eth0
    [Network]
    DHCP=yes
    EOF
    lxc exec tst networkctl reload
    lxc exec tst networkctl

Nic should show as configured
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