The new `create_image_with_partitions()` helper fails under rhel8
currently. The reason is that `mkfs.ext4 -E offset=` will warn
in older versions about a partition table and require user input.
This got fixed `e2fsprogs` 1.46.3 in Jul 2021 but RHEL8 still
has 1.45.
[0] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989612