fix(inputs.mysql): MariaDB example to include mariadb_dialect (#16159) #16160
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Summary
Docker-compose example for inputs.mysql for the MariaDB didn't include mariadb_dialect = true. As all maintained versions of MariaDB are 10.5 it seemed prudent to include.
Also it was possible for telegraf to start before MariaDB was ready. Use the healthcheck mariadb has to ensure that docker compose orders this correctly.
The mariadb container can take straight command line arguments and this will pass though to the mariadb server (mariadbd).
Checklist
Related issues
resolves #16159