HIMonitoring: enable thread-checker and package cleanup

Do not modifiy the global histogram style via gStyle. This is the unused legacy monitoring code, so this should have no impact.

Also move private headers to src/ directory and only build component library.

Targeting 22.0 since monitoring developments will be done there.

This merge request affects 1 package:

• Reconstruction/HeavyIonRec/HIMonitoring

This merge request affects 18 files:

• Reconstruction/HeavyIonRec/HIMonitoring/ATLAS_CHECK_THREAD_SAFETY
• Reconstruction/HeavyIonRec/HIMonitoring/CMakeLists.txt
• Reconstruction/HeavyIonRec/HIMonitoring/HIMonitoring/HIMonitoringElectronsTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/HIMonitoring/HIMonitoringEventShapeTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/HIMonitoring/HIMonitoringMuonsTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/HIMonitoring/HIMonitoringPhotonsTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/HIMonitoring/HIMonitoringZdcTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringElectronsTool.cxx
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringElectronsTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringEventShapeTool.cxx
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringEventShapeTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringMuonsTool.cxx
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringMuonsTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringPhotonsTool.cxx
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringPhotonsTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringZdcTool.cxx
• Reconstruction/HeavyIonRec/HIMonitoring/src/HIMonitoringZdcTool.h
• Reconstruction/HeavyIonRec/HIMonitoring/src/components/HIMonitoring_entries.cxx

Adding @goetz as watcher

added 22.0 DQ JetEtmiss Reconstruction review-pending-level-1 labels

CI Result SUCCESS (hash 355db36f)

	Athena	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 53068]

lgtm approving -- L1

added review-approved label and removed review-pending-level-1 label

added review-approved-tier0 label

added review-approved-point1 label

merged

mentioned in commit b439fa03