MDEV-29220 Missing RHEL-9-specific logic in cpack_rpm.cmake

cmake/cpack_rpm.cmake

@@ -264,7 +264,7 @@ ELSEIF(RPM MATCHES "fedora" OR RPM MATCHES "(rhel|centos)7")
   ALTERNATIVE_NAME("server" "mariadb-server")
   ALTERNATIVE_NAME("server" "mysql-compat-server")
   ALTERNATIVE_NAME("test"   "mariadb-test")
-ELSEIF(RPM MATCHES "(rhel|centos)8")
+ELSEIF(RPM MATCHES "(rhel|centos|rocky)[89]")
   SET(epoch 3:)
   ALTERNATIVE_NAME("backup" "mariadb-backup")
   ALTERNATIVE_NAME("client" "mariadb")