Update to Mysql 8.4 LTS

[joanhey]

Release notes https://dev.mysql.com/doc/relnotes/mysql/8.4/en/news-8-4-0.html

And enable mysql-native-password

MySQL native password authentication changes. Beginning with MySQL 8.4.0, the deprecated mysql_native_password authentication plugin is no longer enabled by default. To enable it, start the server with --mysql-native-password=ON (added in MySQL 8.4.0), or by including mysql_native_password=ON in the [mysqld] section of your MySQL configuration file (added in MySQL 8.4.0).