ATLASRECTS-5666: Migration of JetFitter package to a modularised version in AthenaMT

Description: A new modularised version of the package tested in 21.2. This is the migration to AthenaMT The code runs in both the split and usual b-tagging configuration as defined in https://gitlab.cern.ch/atlas/athena/-/blob/master/PhysicsAnalysis/JetTagging/JetTagAlgs/BTagging/python/BTagRun3Config.py

There are several differences between the 21.2 and the master versions, due to the different environments. Configuration python files are provided in the BTagging/python folder, while keeping (for the time being?) the old JetFitter configuration files.

Tagging @cpollard, @sanmay, @cschiavi, @vdao , @dguest and @guirriec.

Jira: ATLASRECTS-5666

InnerDetector/InDetRecTools/InDetSecVxFinderTool/src/InDetImprovedJetFitterVxFinder.cxx

@@ -166,6 +166,14 @@ namespace InDet
 
     delete twoTrackVertexCandidates;
 
+    ATH_MSG_WARNING( ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>" );
+    ATH_MSG_WARNING( ">>>> Size primaryTracks = " << primaryTracks.size() );
+    ATH_MSG_WARNING( ">>>> Size secondaryTracks = " << secondaryTracks.size() );
+    ATH_MSG_WARNING( ">>>> Size vertexCandidates = " << vertexCandidates.size() );
+    ATH_MSG_WARNING( ">>>> Size tracksToUseInFirstFit = " << tracksToUseInFirstFit.size() );
+    ATH_MSG_WARNING( ">>>> Size tracksToUseInSecondFit = " << tracksToUseInSecondFit.size() );
+    ATH_MSG_WARNING( ">>>>" );
+
     // Sort track collection by pT
     ATH_MSG_DEBUG( "Sorting track collection (tracksToUseInFirstFit) by pT..." );
     sortTrackCollectionByPt( tracksToUseInFirstFit );