Move individual config files to the subpackages that make use of them

Instead of having all of them in the main daemon package, move jack.conf to the -jack subpackage, pipewire-pulse.conf to -pulseaudio subpackage, and client.conf and client-rt.conf to -libs subpackage.

This makes sure we have the correct config files installed in Fedora flatpak runtime where the daemon is not installed (but the library packages are).