Don't export fuselage and wings segmentwise.

[joergbrech]

Description

Fixes #897. See description in issue.

How Has This Been Tested?

existing unit and integration tests

Checklist:

• A test for the new functionality was added.
• All tests run without failure.
• The new code complies with the TiGL style guide.
• New classes have been added to the Python interface.
• API changes were documented properly in tigl.h.

[codecov-commenter]

Codecov Report

Merging #899 (5b0903a) into master (8127fbd) will decrease coverage by 0.01%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master     #899      +/-   ##
==========================================
- Coverage   69.30%   69.28%   -0.02%     
==========================================
  Files         295      295              
  Lines       24748    24744       -4     
==========================================
- Hits        17151    17144       -7     
- Misses       7597     7600       +3     

Impacted Files	Coverage Δ
src/exports/CTiglCADExporter.cpp	63.80% <50.00%> (-1.33%)	⬇️
src/geometry/CTiglTriangularizer.cpp	85.38% <0.00%> (-1.76%)	⬇️