Remove superfluous success message and update only changed smart card

We don't need to report the successful change of card holder or public
key URL because the user gets immediate feedback by the update of the
displayed values. Updating only the card that was changed ensures that
the displayed values are updated quickly.

(cherry picked from commit a7de5d923d5397790428412153aec78ab70b9f4e)

• GnuPG-bug-id: T7018