refactor: Propagator deduce parameter type from stepper

[benjaminhuth]

The main change is that the Acts::Propagator now deduces the parameters type (bound and curvilinear) from the stepper.

This allows the MultiStepper to return multi-component-parameters, and makes the whole structure of the GSF more straight.

Related changes to GSF infrastructure:

• Add multi component curvilinear track parameters
• Remove workaround to get final parameters (this leads to changed output, because with the workaround there was one additional transport-to-bound, which causes floating-point-differences)

[benjaminhuth]

@andiwand @paulgessinger Let me know what you think about the change.

I think this is NOT breaking, because for all non-GSF code the acutal types involved don't change, and the GSF is still in Acts::Experimental.

If preffered, I could split of the part with the optional covariance...

[paulgessinger]

Seems reasonable

[codecov]

Codecov Report

Merging #2413 (0b1a961) into main (a9ab6a5) will increase coverage by 0.02%.
The diff coverage is 40.38%.

@@            Coverage Diff             @@
##             main    #2413      +/-   ##
==========================================
+ Coverage   49.82%   49.84%   +0.02%     
==========================================
  Files         468      468              
  Lines       26539    26524      -15     
  Branches    12197    12187      -10     
==========================================
- Hits        13224    13222       -2     
- Misses       4632     4634       +2     
+ Partials     8683     8668      -15     

Files	Coverage Δ
.../include/Acts/Propagator/MultiEigenStepperLoop.hpp	69.02% <100.00%> (-0.17%)	⬇️
Core/include/Acts/Propagator/Propagator.hpp	92.68% <ø> (ø)
Core/include/Acts/TrackFitting/detail/GsfActor.hpp	45.11% <ø> (-0.72%)	⬇️
Core/include/Acts/TrackFitting/detail/GsfUtils.hpp	60.00% <ø> (ø)
.../TrackFitting/detail/SymmetricKlDistanceMatrix.hpp	65.00% <ø> (ø)
Core/include/Acts/Propagator/Propagator.ipp	43.58% <0.00%> (ø)
...re/include/Acts/TrackFitting/GaussianSumFitter.hpp	43.42% <42.85%> (-0.95%)	⬇️
.../include/Acts/Propagator/MultiEigenStepperLoop.ipp	41.74% <44.44%> (+3.46%)	⬆️
...e/Acts/EventData/MultiComponentTrackParameters.hpp	54.21% <36.00%> (ø)

... and 1 file with indirect coverage changes

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[github-actions]

📊: Physics performance monitoring for 0b1a961

Full contents

physmon summary

• ✅ CKF truth_smeared
• ✅ IVF truth_smeared
• ✅ AMVF truth_smeared
• ✅ Track Summary CKF truth_smeared
• ✅ Seeding truth_estimated
• ✅ CKF truth_estimated
• ✅ IVF truth_estimated
• ✅ AMVF truth_estimated
• ✅ Track Summary CKF truth_estimated
• ✅ Seeding seeded
• ✅ CKF seeded
• ✅ IVF seeded
• ✅ AMVF seeded
• ✅ AMVF (+grid seeder) seeded
• ✅ Track Summary CKF seeded
• ✅ Seeding orthogonal
• ✅ CKF orthogonal
• ✅ IVF orthogonal
• ✅ AMVF orthogonal
• ✅ Track Summary CKF orthogonal
• ✅ Ambisolver seeded
• ✅ Ambisolver orthogonal
• ✅ Seeding ttbar
• ✅ CKF ttbar
• ✅ Ambisolver
• ✅ Track Summary CKF ttbar
• ✅ AMVF ttbar
• ✅ AMVF (+grid seeder) ttbar
• ✅ Truth tracking (GSF)
• ✅ Truth tracking
• ✅ Particles inital fatras
• ✅ Particles final fatras
• ✅ Particles inital geant4
• ✅ Particles final geant4

[paulgessinger]

What's the plan for this @benjaminhuth?

[benjaminhuth]

Hmm I resolved the merge conflicts. If physmon is green I think I would propose to merge it

[kodiakhq]

This PR currently has a merge conflict. Please resolve this and then re-add the automerge label.

[acts-project-service]

✅ Athena integration test results

✅ All tests successful

status	job
🟢	run_unit_tests
🟢	run_ci_tests: ../athena/AtlasTest/CITest/test/ActsWorkflow.sh
🟢	run_ci_tests: ../athena/AtlasTest/CITest/test/ActsValidateTracks.sh
🟢	run_ci_tests: ../athena/AtlasTest/CITest/test/ActsValidateActsCoreSpacePoints.sh
🟢	run_ci_tests: ../athena/AtlasTest/CITest/test/ActsValidateActsSpacePoints.sh
🟢	run_ci_tests: ../athena/AtlasTest/CITest/test/ActsValidateSeeds.sh
🟢	run_ci_tests: ../athena/AtlasTest/CITest/test/ActsValidateOrthogonalSeeds.sh
🟢	run_ci_tests: ../athena/AtlasTest/CITest/test/ActsValidateClusters.sh
🟢	run_ci_tests: ../athena/AtlasTest/CITest/test/ActsPersistifyEDM.sh
🟢	run_ci_tests: ../athena/AtlasTest/CITest/test/ActsKfRefitting.sh
🟢	run_ci_tests: python3 ../athena/Tracking/Acts/ActsGeometry/test/ActsExtrapolationAlgTest.py
🟢	run_ci_tests: python3 ../athena/Tracking/Acts/ActsGeometry/test/ActsITkTest.py
🟢	run_workflow_tests_run4_mc
🟢	run_workflow_tests_run2_data
🟢	run_workflow_tests_run3_mc
🟢	run_workflow_tests_run3_data