admin: Add ot_admin_checksum_version to get a dup of the version for a commit
dump: Print the version when dumping a commit, log/show/etc.
admin status: Print the version
Fix ot_adimin_checksum_version to not assume version is a string

 Policy for versions is for the rpm-ostree layer, at the ostree level
we'll just print them out if they are the strings rpm-ostree sets.