refactor: Remove missed components as early as possible & more

[benjaminhuth]

This refactors the Acts::MultiEigenStepperLoop code in a way, that missed components are removed as early as possible. Now the code should also be more consistent, so that some checks and workarounds in the Acts::GsfActor could be removed.

[codecov]

Codecov Report

Merging #1921 (74c5207) into main (9bc6abf) will increase coverage by 0.04%.
The diff coverage is 40.86%.

@@            Coverage Diff             @@
##             main    #1921      +/-   ##
==========================================
+ Coverage   49.48%   49.53%   +0.04%     
==========================================
  Files         408      408              
  Lines       22704    22707       +3     
  Branches    10363    10362       -1     
==========================================
+ Hits        11236    11247      +11     
+ Misses       4257     4251       -6     
+ Partials     7211     7209       -2     

Impacted Files	Coverage Δ
Core/include/Acts/TrackFitting/detail/GsfActor.hpp	43.11% <33.33%> (+0.06%)	⬆️
Core/include/Acts/TrackFitting/detail/GsfUtils.hpp	52.30% <33.33%> (+0.79%)	⬆️
.../include/Acts/Propagator/MultiEigenStepperLoop.ipp	36.22% <45.00%> (+4.76%)	⬆️
...e/include/Acts/Propagator/MultiStepperAborters.hpp	65.51% <66.66%> (+0.13%)	⬆️
.../include/Acts/Propagator/MultiEigenStepperLoop.hpp	72.06% <70.00%> (-0.13%)	⬇️

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[github-actions]

📊 Physics performance monitoring for 74c5207

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