The epel-9 chroots moved to rhel+epel

The post- RHEL 9 GA time allowed us to move the epel-9-* chroots to the official RHEL 9 + EPEL content (from previous CentOS Stream 9 + EPEL 9). Should you have any problems with RHEL+EPEL 9, please report. Just to recap, it means that EPEL 9 chroots use similar principles to previously moved EPEL 8, while EPEL 7 still uses (supported) CentOS 7: https://lists.fedoraproject.org/archives/list/copr-devel@lists.fedorahost... Description in the "project -> settings" (and "$ copr list-chroots") were updated accordingly to self-document. Happy building, Pavel