Improve packit configuration
Improve packit configuration

Add epel-9 target. Remove propose_downstream job because we are
not ready to use it, but it still spams source-git with PRs.

OpenSCAP/openscap,OpenSCAP/openscap,OpenSCAP/openscap,OpenSCAP/openscap,OpenSCAP/openscap,OpenSCAP/openscap