Delete the no longer used osbuild-images-tests command. Subsequently,
delete the /internal/boot packages, which were used only by the command
and also depended on its data structures.
Technically, no boot test were done using the code in this repository
for quite some time. And the long term plan is to boot test all images
in the osbuild/images repository.
Signed-off-by: Tomáš Hozza <thozza@redhat.com>
9042ee7806