create and drop catalogs inside MariaDB Server

At the moment a MariaDB Def superuser can create a catalog with the "CREATE CATALOG" command, but this does not create the privilege tables. You can also use mariadb-install-db, but this requires at least OS access to the MariaDB datadir and Def superuser privileges.

It is not possible for many admin panel UIs to gain enough OS privileges to run mariadb-install-db for security reasons. So, there should be a way to create a new catalog inside MariaDB that just uses the Def superuser.