fix publish rpms on release action

[jwlodek]

• Add workflow for just builds for testing builds in CI
• Enable EPEL repository in CI
• Use correct dependency package name
• Install rpmbuild
• Use correct package name
• Enable powertools/crb
• Install config-manager dnf plugin
• Some minor cleanup
• Only create softlink w/o version suffix with devel package install
• Use correct github action for setting up gh cli tool