snapcraft: bump to zfs 2.2.3 (compat with kernel 6.7 & 6.8)

[simondeziel]

I'm proposing this one out of cycle because Ubuntu 24.04 is now shipping kernel 6.8.

[simondeziel]

I'm proposing this one out of cycle because Ubuntu 24.04 is now shipping kernel 6.8.

Probably a moot point as updating our tooling won't don't anything for the zfs.ko module itself. The kernel team apparently already did the needed backports there because their zfs.ko reports version 2.2.2-0ubuntu4.

Anyway, it probably doesn't hurt to update now rather than later, this 2.2.3 release is 2 weeks old.

[simondeziel]

Casually tested to be working:

root@v1:~# LD_LIBRARY_PATH=/snap/lxd/current/lib/:/snap/lxd/current/lib/x86_64-linux-gnu/:/snap/lxd/current/zfs-2.2/lib nsenter --mount=/run/snapd/ns/lxd.mnt /snap/lxd/current/zfs-2.2/bin/zfs version
zfs-2.2.3-1
zfs-kmod-2.2.2-0ubuntu4
root@v1:~# lxc storage create z zfs
Storage pool z created
root@v1:~# lxc storage volume create z foo
Storage volume foo created
root@v1:~# lxc storage volume create z bar --type=block
Storage volume bar created
root@v1:~# lxc storage volume ls z
+--------+------+-------------+--------------+---------+
|  TYPE  | NAME | DESCRIPTION | CONTENT-TYPE | USED BY |
+--------+------+-------------+--------------+---------+
| custom | bar  |             | block        | 0       |
+--------+------+-------------+--------------+---------+
| custom | foo  |             | filesystem   | 0       |
+--------+------+-------------+--------------+---------+