Missing "mysql" command in the docker image (Debian Bookworm)

When launching the "drush sql:cli" command which is supposed to log in the database & show a prompt, I get the following error on the Debian Bookworm based image :

```
root@a989d44603d7:/app# drush sql:cli
[warning] The shell command 'mysql' is required but cannot be found. Please install it and retry.
```

I think the dependency "mariadb-client" should be included in the base image, so that we don't need to customize the Dockerfile for this basic need. What do you think ? I'll prepare a PR right away.