MT#61373 Use mariadb-install-db to create db

/usr/bin/mysql_install_db: Deprecated program name.
It will be removed in a future release, use 'mariadb-install-db' instead

Change-Id: I09bb289708c513d4ee0a229a6b1f859e064cfea2

build_utils/ngcp-build-schema-files

@@ -38,7 +38,7 @@ mysql_install_options+=("--skip-test-db")
 mysql_install_options+=("--user=mysql")
 mysql_install_options+=("--skip-networking")
 
-mysql_install_db "${mysql_install_options[@]}"
+mariadb-install-db "${mysql_install_options[@]}"
 
 declare -a mysqld_options
 mysqld_options+=("--defaults-file=${mariadb_dir}/my.cnf")