This does a minor cleanup over all OpenFOAM cases. It is definitely a "high effort / low benefit" task, but these tiny aspects always looked strange and sometimes also triggered confusion.

Summary:

• Remove optional or completely foreign fields from the headers. A FoamFile only needsversion, format, class, and object (mandatory but not used). The location is optional and it was, in many cases, misleading. Anything else is probably a relic from the original tool/source.
• Bring a bit of consistency in the indentation.
• Remove misleading and version-specific OpenFOAM copyright notices. These are not OpenFOAM files and it is quite a stretch to keep the headers here.
• Remove the RAS options from turbulentProperties (since we always set laminar).
• Remove some duplicate settings (setting the same value as the default) from fvSchemes in the heat-exchanger (probably relic from SimScale).
• Remove the unused radiationProperties from the heat-exchanger.
• Update the note regarding pimpleDyMFoam to make it really a special case that most people should not worry about.
• Some whitespace and formatting here and there.

We can probably still cleanup a lot if we look at the semantics and default settings, but we can also do this in a later point. If anyone has any suggestions for usual suspects to check and cleanup, they are very welcome!

I have collected all the changes for each case in one commit, for easier review.

@davidscn a second pair of eyes would be useful here.