Cleanup description of shortname expansion
Cleanup description of shortname expansion

When short name expansion is happening in Podman and Buildah there
are two many useless words being repeated on the screen. Also the
actual expansion is never shown. This PR shortens the text to only
the key descriptions and displays the actual long name.

podman pull ubi8
Resolved "ubi8" short name (/etc/containers/registries.conf.d/shortnames.conf)

podman pull mariadb
Resolving "mariadb" from registries (/etc/containers/registries.conf)
...

Signed-off-by: Daniel J Walsh <7800de746fd39599bc46177380ea6aede7e31e16@redhat.com>

containers/image,containers/image