Backport of commit 6aaf6a2843.
system reset it says it will delete containers, images, networks, etc...
However it will also delete the graphRoot and runRoot directories.
Normally this is not an issue, however in same cases these directories
were set to the users home directory or some other important system
directory.
As first step simply show the directories that are configured and thus
will be deleted by reset. As future step we could implement some
safeguard will will not delete some known important directories however
I tried to keep it simple for now.
[NO NEW TESTS NEEDED]
see #18349, #18295, and #19870
Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>