feat: update OpenDataDetector, refine DD4hep material handling

[asalzburger]

This PR combines two features that are coupled:

• updates the OpenDataDetector description (with boundary material)
• refines the way boundary material is handled (e.g. ODDCylinderLayerBuilder)

With this, quite remarkable agreement between G4 and ACTS in terms of material budget can be achieved.

The changes to the OpenDataDetector include:

• allow boundary material for solenoid volume
• reduce thickness of solenoid coil to match ~ATLAS values

[codecov]

Codecov Report

Merging #895 (9e2c3b3) into main (bb4ba16) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #895   +/-   ##
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  Coverage   48.66%   48.66%           
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  Files         331      331           
  Lines       17129    17129           
  Branches     8094     8094           
=======================================
  Hits         8336     8336           
  Misses       3087     3087           
  Partials     5706     5706           

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