Diagram on HPC Infrastructure

We need a (scriptable?!) diagram showing the HPC infrastructure.

added 1 deleted label

changed milestone to %Umstellung

Why not take inspiration here: https://gitlab.hrz.tu-chemnitz.de/help/user/markdown.md#diagrams-and-flowcharts

added Priority: Low label

assigned to @mark--tu-dresden.de

Passt zu #449