feat: Minimal example for using C++20 concepts

[paulgessinger]

This adds a very simple SurfaceVisitorConcept to test the conditional implementation.

[paulgessinger]

The concept is intentionally wrong (takes a reference instead of a pointer) to showcase the error we (hopefully) get in the CI.

[codecov]

Codecov Report

Merging #2034 (b305417) into main (da77587) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2034   +/-   ##
=======================================
  Coverage   49.85%   49.85%           
=======================================
  Files         421      421           
  Lines       23889    23889           
  Branches    10843    10843           
=======================================
  Hits        11911    11911           
  Misses       4357     4357           
  Partials     7621     7621           

Impacted Files	Coverage Δ
Core/include/Acts/Geometry/TrackingGeometry.hpp	100.00% <ø> (ø)
Core/include/Acts/Geometry/TrackingVolume.hpp	70.73% <ø> (ø)

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[github-actions]

📊 Physics performance monitoring for b305417

Full report
Seeding: seeded, truth estimated, orthogonal
CKF: seeded, truth smeared, truth estimated, orthogonal
IVF: seeded, truth smeared, truth estimated, orthogonal
Ambiguity resolution: seeded, orthogonal
Truth tracking
Truth tracking (GSF)

Vertexing

Vertexing vs. mu

IVF seeded

IVF truth_smeared

IVF truth_estimated

IVF orthogonal

Seeding

Seeding seeded

Seeding truth_estimated

Seeding orthogonal

CKF

CKF seeded

CKF truth_smeared

CKF truth_estimated

CKF orthogonal

Ambiguity resolution

seeded

Truth tracking (Kalman Filter)

Truth tracking

Truth tracking (GSF)

Truth tracking

[benjaminhuth]

Very nice!

[benjaminhuth]

Ah didn't read the comment that it should fail

[paulgessinger]

It did fail, and then I fixed the concept, so now we indeed expect success.