refactor: geant4 converters

[andiwand]

split off changes from my calorimeter demo. this changes most of the shared pointers to unique pointers in the converter because we use unique pointers downstream sometimes. and unique pointers can be upgraded to shared pointers directly. it also includes a generalization of the material conversion and transform conversion

update and summary

• switched from unique_ptr consistently to shared_ptr after discussion
• added Geant4VolumeConverter
• added transform translation for G4 phyiscal volumes
• added generic material translation

[codecov]

Codecov Report

Merging #2048 (6c36307) into main (2e45ac2) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2048      +/-   ##
==========================================
- Coverage   49.40%   49.39%   -0.01%     
==========================================
  Files         434      434              
  Lines       24984    24984              
  Branches    11524    11526       +2     
==========================================
- Hits        12343    12341       -2     
  Misses       4486     4486              
- Partials     8155     8157       +2     

Impacted Files	Coverage Δ
Core/include/Acts/Detector/DetectorVolume.hpp	74.28% <ø> (ø)
Core/src/Detector/DetectorVolume.cpp	49.36% <ø> (ø)

... and 1 file with indirect coverage changes

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[github-actions]

📊 Physics performance monitoring for 6c36307

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

[asalzburger]

I am in principle ok with the PR, just wanted to cross-check on a few points.

[andiwand]

@asalzburger implemented your suggested changes

[asalzburger]

Good to go, questions have been addressed.