"ceph-salt update" should indicate what packages have been updated

When running `ceph-salt update`, I do see that the update process is ongoing and eventually finishes:


However, I do not see a summary of what packages have actually been updated/installed. I can glean that information from the log file `/var/log/ceph-salt.log`, but it would be more user-friendly, if we could find a way to display that information in the CLI directly.

Start by reproducing `ceph-salt update` and compare its CLI output with `/var/log/ceph-salt.log`, where the updated package information is currently available. Done means the command directly displays a summary of packages that were updated or installed.

Written by the indexing model from the issue text.