SSSCTL: user-show says that user is expired
sssctl user-show says that user is expired if the user comes from files
provider. This is ok because files user's expiration time is always set
to 0 but we should print a better, less confusing message.
The same change apply to groups.
Resolves:
https://pagure.io/SSSD/sssd/issue/3858
Reviewed-by: Pavel Březina <pbrezina@redhat.com>