Fix start of MySQL container

The module used is deprecated with MySQL8 and doesn't work with MySQL9
anymore. It seems we don't need it anymore, but the alternative is to
keep using the MySQL8 container and not test for MySQL9.

Author: vmcj

gitlab/ci/template.yml

@@ -36,7 +36,6 @@
     - /bin/true
   services:
     - name: mysql
-      command: ["--mysql-native-password", "--authentication_policy=mysql_native_password"]
       alias: sqlserver
 
 .mariadb_job: