app-admin/google-guest-configs: New package to install udev disk rules

[chewi]

google-guest-configs: New package to install udev disk rules

We already have GCE disk rules in coreos-init, but a user has pointed out that the newer NVMe rules are missing. Let's take the rules directly from upstream instead. This is loosely based on the ChromiumOS package of the same name.

This only installs the udev disk rules because the network rules are not GCE-specific. The disk rules need to be in the initrd, so we cannot separate this package from other platforms by putting it in the GCE OEM image. We could split this package in two, but the network rules don't seem essential.

The wider GCE packages are very outdated. I started looking into this in early 2025. I then noticed this had already been attempted the year before in #1826. This change at least implements a small part of what was in that PR without touching the rest.

How to use

Spin up a VM with Kola using --gce-machinetype c3-standard-4 and check whether the "google" symlink exists under /dev/disk.

Testing done

An amd64-only Jenkins run using GCE has passed. I've also manually tested as above.

core@kola-1bbaa453890f254e976c ~ $ ls -l /dev/disk/by-id/google*            
lrwxrwxrwx. 1 root root 13 Dec 29 22:26 /dev/disk/by-id/google-nvme_card-pd -> ../../nvme0n1
lrwxrwxrwx. 1 root root 15 Dec 29 22:26 /dev/disk/by-id/google-nvme_card-pd-part1 -> ../../nvme0n1p1
lrwxrwxrwx. 1 root root 15 Dec 29 22:26 /dev/disk/by-id/google-nvme_card-pd-part2 -> ../../nvme0n1p2
lrwxrwxrwx. 1 root root 15 Dec 29 22:26 /dev/disk/by-id/google-nvme_card-pd-part3 -> ../../nvme0n1p3
lrwxrwxrwx. 1 root root 15 Dec 29 22:26 /dev/disk/by-id/google-nvme_card-pd-part4 -> ../../nvme0n1p4
lrwxrwxrwx. 1 root root 15 Dec 29 22:26 /dev/disk/by-id/google-nvme_card-pd-part6 -> ../../nvme0n1p6
lrwxrwxrwx. 1 root root 15 Dec 29 22:26 /dev/disk/by-id/google-nvme_card-pd-part7 -> ../../nvme0n1p7
lrwxrwxrwx. 1 root root 15 Dec 29 22:26 /dev/disk/by-id/google-nvme_card-pd-part9 -> ../../nvme0n1p9

• Changelog entries added in the respective changelog/ directory (user-facing change, bug fix, security fix, update)
• Inspected CI output for image differences: /boot and /usr size, packages, list files for any missing binaries, kernel modules, config files, kernel modules, etc.