Move gnome-tour dep here from gnome-initial-setup
In GNOME 40 it's gnome-shell's welcome dialog that launches gnome-tour
and no longer gnome-initial-setup.
Add it as recommends instead of hard requires to make it possible for
users to remove the launcher if needed as the desktop file is no longer
hidden in GNOME 40.
https://bugzilla.redhat.com/show_bug.cgi?id=1955179