CI: Spurious mkfs failures since migrating to Ubuntu 22.04

[DaanDeMeyer]

‣ Detaching namespace
‣ Setting up package cache…
‣ Setting up package cache /home/runner/work/mkosi/mkosi/mkosi.cache/arch~rolling complete
‣ Setting up temporary workspace.
‣ Temporary workspace set up in /var/tmp/mkosi-gqatmwf_
‣ Running second (final) stage…
‣  Creating image with partition table…
Disk /home/runner/work/mkosi/mkosi/mkosi.output/.mkosi-ufhhjp4k: 3 GiB, 3221266432 bytes, 62915[36](https://github.com/systemd/mkosi/runs/7325946442?check_suite_focus=true#step:7:37) sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
>>> Script header accepted.
>>> Script header accepted.
>>> Script header accepted.
>>> Created a new GPT disklabel (GUID: 30A5E1F6-0AC4-5844-855F-5BE418587820).
/home/runner/work/mkosi/mkosi/mkosi.output/.mkosi-ufhhjp4k1: Created a new partition 1 of type 'Linux root (x86-64)' and of size 3 GiB.
/home/runner/work/mkosi/mkosi/mkosi.output/.mkosi-ufhhjp4k2: Done.
New situation:
Disklabel type: gpt
Disk identifier: 30A5E1F6-0AC4-5844-855F-5BE418587820
Device                                                      Start     End Sectors Size Type
/home/runner/work/mkosi/mkosi/mkosi.output/.mkosi-ufhhjp4k1    [40](https://github.com/systemd/mkosi/runs/7325946442?check_suite_focus=true#step:7:41) 6291495 6291[45](https://github.com/systemd/mkosi/runs/7325946442?check_suite_focus=true#step:7:46)6   3G Linux root (x86-64)
The partition table has been altered.
‣  Created image with partition table as /home/runner/work/mkosi/mkosi/mkosi.output/.mkosi-ufhhjp4k
‣  Attaching /home/runner/work/mkosi/mkosi/mkosi.output/.mkosi-ufhhjp4k as loopback…
‣  Attached /dev/loop3
‣  Formatting root partition…
mke2fs 1.[46](https://github.com/systemd/mkosi/runs/7325946442?check_suite_focus=true#step:7:47).5 (30-Dec-2021)
The file /dev/loop3p1 does not exist and no size was specified.