MuonSpectrometer clang-tidy fixed Part II use nullptr, pass by const reference

WARNING: big files (>100K) are found in the changeset

136K in file MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/DCMathSegmentMaker/src/DCMathSegmentMaker.cxx

124K in file MuonSpectrometer/MuonReconstruction/MuonSegmentCombiners/MuonSegmentCombinerTools/MuonCurvedSegmentCombiner/src/MuonCurvedSegmentCombiner.cxx

132K in file MuonSpectrometer/MuonCnv/MuonTGC_CnvTools/src/TgcRdoToPrepDataToolCore.cxx

116K in file MuonSpectrometer/Amdcsimrec/AmdcDb/src/AmdcDbSvcMakerFromAmdc.cxx

552K in file MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/RpcRawDataMonitoring/src/RPCStandaloneTracksMon.cxx

108K in file MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/MdtRawDataMonitoring/src/MdtRawDataValAlg.cxx

180K in file MuonSpectrometer/MuonGeoModelTest/src/MuonGMCheck.cxx

164K in file MuonSpectrometer/MuonDigitization/RPC_Digitization/src/RpcDigitizationTool.cxx

104K in file MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerAlgs/CscSegmentMakers/src/CscSegmentUtilTool.cxx

360K in file MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/RpcRawDataMonitoring/src/RpcRawDataValAlg.cxx

This merge request affects 102 packages. Since this is a long list, it will not be printed.

Adding @sutt ,@jchapman ,@rosati ,@wleight ,@stavrop ,@jojungge ,@goetz ,@egodden as watchers

added DQ Digitization MuonSpectrometer Simulation Tau Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash 6558defc)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	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
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 44551]

Changes are clear, I have just a minor comment, approving

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

resolved all threads

added 1 commit

ad77fef8 - rm an utility include

Compare with previous version