Let run-tests.sh print db type and version in the initial output

Quite straightforward.

++ to get it in as it will help to debug even Mongodb

Adding a c& p of the output to the issue summary. Out of time for the day but this looks great!

Committed/pushed to 11.x and cherry-picked to 11.2.x, thanks!

catch → closed merge request !12412

Automatically closed - issue fixed for 2 weeks with no activity.