Improvements to vertex/silicon wrapper

[armin-ilg]

BEGINRELEASENOTES

• No more warnings in silicon wrapper
• Improvements in vertex builder printouts
• Adding all materials of beam pipe also to material_plots_2D.py, as without having the beam pipe enabled, the vertex material budget estimation will fail.
• Changed paths to .stl files in vertex to use https://fccsw.web.cern.ch/fccsw/filesForSimDigiReco/IDEA/IDEA_o1_v03/STL_FILES/ (still commented out due to overlaps)
  ENDRELEASENOTES

@BrieucF: As you requested I fixed the warnings in the silicon wrapper.

P.s:
I don't know how to squash all the commits, sorry that this is such a mess

[andresailer]

Can you stop touching your branch for 5 minutes?

[BrieucF]

Shall we merge this before or after #392?

[tmadlener]

There will most likely be a conflict either way. So, I don't have any strong preferences.

[andresailer]

Merging this, applying a styler and then cherry-picking the diff from #392 is probably easier than the other way around, and these changes here are only feature changes, so would not be nice to punish Armin :)