feat: Method to add components to an existing track state

[andiwand]

While working on the CKF I encountered the problem that track state components need to be created when the track state is created. Since the CKF will not smooth anymore after #2722 the user might want to add smoothed states to the existing track states without reallocating and copying all the existing states.

In case of the vector implementation the components will not be next to each other in the memory.

[codecov]

Codecov Report

Attention: Patch coverage is 41.37931% with 51 lines in your changes are missing coverage. Please review.

Project coverage is 49.02%. Comparing base (05620d7) to head (09c0949).

Files	Patch %	Lines
...ts/EventData/detail/MultiTrajectoryTestsCommon.hpp	5.76%	0 Missing and 49 partials ⚠️
Core/src/EventData/VectorMultiTrajectory.cpp	93.75%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3075      +/-   ##
==========================================
- Coverage   49.05%   49.02%   -0.03%     
==========================================
  Files         494      494              
  Lines       28972    29059      +87     
  Branches    13741    13797      +56     
==========================================
+ Hits        14211    14247      +36     
  Misses       4929     4929              
- Partials     9832     9883      +51     

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[github-actions]

📊: Physics performance monitoring for 09c0949

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
• ✅ Truth tracking (GX2F)
• ✅ Particles fatras
• ✅ Particles geant4

[paulgessinger]

Can you add a test for this?

[acts-project-service]

✅ Athena integration test results [a8a032e]

✅ All tests successful

status	job	report
🟢	run_unit_tests
🟢	test_ActsEFTrackFit
🟢	test_ActsPersistifySeeds
🟢	test_ActsBenchmarkWithSpot
🟢	test_ActsAnalogueClustering
🟢	test_ActsConversionWorkflow
🟢	test_ActsWorkflowFastTracking
🟢	test_ActsWorkflow
🟢	test_ActsValidateAmbiguityResolution
🟢	test_ActsValidateResolvedTracks
🟢	test_ActsValidateTracks
🟢	test_ActsValidateActsCoreSpacePoints
🟢	test_ActsValidateActsSpacePoints
🟢	test_ActsValidateSeeds
🟢	test_ActsValidateOrthogonalSeeds
🟢	test_ActsValidateClusters
🟢	test_ActsPersistifyEDM
🟢	test_ActsGSFRefitting
🟢	test_ActsKfRefitting
🟢	test_ActsExtrapolationAlgTest
🟢	test_ActsITkTest
🟢	run_workflow_tests_run4_mc
🟢	run_workflow_tests_run2_mc
🟢	run_workflow_tests_run2_data
🟢	run_workflow_tests_run3_mc
🟢	run_workflow_tests_run3_data
🟢	run_art_test: test_data18_13TeV_1000evt
🟢	run_art_test: test_ttbarPU40_reco