Before this change, Ubuntu provisioning script used the package list
from Alpine. But a lot of packages from that list have name mismatches.
Biggest example - `docker`, which has nothing to do with Docker as a
container engine in Ubuntu (the proper package is `docker.io`). Let's
just keep the full list for Ubuntu in its own provisioning script.
Signed-off-by: Michal Rostecki <mrostecki@opensuse.org>