rpm-ostree: Set HIDE_FROM_SEARCH quirk for apps we don't want to show

The plan for Fedora Silverblue is to use rpm-ostree layering for things
that are non-apps (e.g. hardware support, codecs, fonts etc that
supplement the base system), and only offer apps through flatpak.

This commit makes it so that available apps don't show up in search, but
anything already installed still gets correctly shown (so that they are
removable / launchable /updatable etc).
1 job for master in 20 minutes and 49 seconds (queued for 1 second)
Status Job ID Name Coverage
passed #288097