add mysql-vars for new OS

roles/mysql_hardening/vars/RedHat_9.yml

@@ -0,0 +1,9 @@
+---
+mysql_daemon: mariadb
+mysql_hardening_mysql_conf_file: '/etc/my.cnf'
+mysql_hardening_mysql_confd_dir: '/etc/my.cnf.d'
+
+mysql_cnf_owner: 'root'  # owner of /etc/mysql/*.cnf files
+mysql_cnf_group: 'mysql'  # owner of /etc/mysql/*.cnf files
+
+mysql_hardening_group: 'mysql'

roles/mysql_hardening/vars/Rocky_9.yml

@@ -0,0 +1,9 @@
+---
+mysql_daemon: mariadb
+mysql_hardening_mysql_conf_file: '/etc/my.cnf'
+mysql_hardening_mysql_confd_dir: '/etc/my.cnf.d'
+
+mysql_cnf_owner: 'root'  # owner of /etc/mysql/*.cnf files
+mysql_cnf_group: 'mysql'  # owner of /etc/mysql/*.cnf files
+
+mysql_hardening_group: 'mysql'