Add AMVF unit test for user-defined track type

[baschlag]

Adds a unit test for user-defined track types for the AMVF and fixed one bug that appeared while testing it.

[codecov]

Codecov Report

Merging #75 into master will increase coverage by 0.05%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #75      +/-   ##
==========================================
+ Coverage   42.55%   42.61%   +0.05%     
==========================================
  Files         348      348              
  Lines       16637    16584      -53     
  Branches     7907     7880      -27     
==========================================
- Hits         7080     7067      -13     
+ Misses       4893     4875      -18     
+ Partials     4664     4642      -22

Impacted Files	Coverage Δ
...clude/Acts/Vertexing/AdaptiveMultiVertexFinder.ipp	33.09% <0%> (+1.76%)	⬆️
Core/include/Acts/Surfaces/Surface.hpp	50% <0%> (-10%)	⬇️
Core/src/Surfaces/StrawSurface.cpp	34.78% <0%> (-3.22%)	⬇️
Core/src/Surfaces/PerigeeSurface.cpp	38.09% <0%> (-3.21%)	⬇️
...clude/Acts/Vertexing/AdaptiveMultiVertexFinder.hpp	81.25% <0%> (-2.09%)	⬇️
Core/src/Surfaces/CylinderBounds.cpp	57.77% <0%> (-1.8%)	⬇️
Core/src/Surfaces/RadialBounds.cpp	76% <0%> (-1.78%)	⬇️
Core/src/Surfaces/PlaneSurface.cpp	43.05% <0%> (-1.69%)	⬇️
Core/src/Surfaces/RectangleBounds.cpp	35.29% <0%> (-1.55%)	⬇️
Core/src/Surfaces/Surface.cpp	47.76% <0%> (-1.5%)	⬇️
... and 42 more

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[asalzburger]

Looks good to me.

[asalzburger]

Mergin this in, overall unit test coverage increases.

[robertlangenberg]

looks good to me