New wiki-entry about reproducing our scaling results

[Davknapp]

Feature request

Following the discussion in #1184 we want to move the description about how to reproduce our scaling results.

Is your feature request related to a problem? Please describe.
A reviewer had difficulties to verify our scaling results. This should be easy to do.

Describe the solution or feature you'd like
A good description in our wiki might help. It is very accessible and probably one of the first points one might look for help. @holke explanation is already a good starting point.

Describe alternatives you've considered

Estimated priority

"Priority: medium" Should be solved within half a year

Additional context
Add any other context or screenshots about the feature request here.

[holke]

This is the description David is referring to: #1184 (comment)

[ole-alb]

I added a wiki article Reproducing Scaling Results