[11.x] github: mariadb database healthcheck+naming #51192
Merged
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MariaDB's container has a healthcheck.sh script that can be used. mysqladmin ping has flaw that it checks unix socket first which means it can return true while the database is been bootstrapped.
Also use the MariaDB names as we haven't been MySQL for a while.
I looked at a 10.x merge of this, but it uses a different database name ("forge") and would have been a merge conflict going up. Happy to do a 10.x fix if desired.