Add check for misconfigurations of cachecreators

See merge request !20227

athenaHLT: Fix creation of worker directories and MessageSvc format

See merge request !20257

TrigT1TGC: Fix gcc9 warnings.

See merge request !20244

DecisionHandling: Fix test miscompare with clang.

See merge request !20243

FastCaloSim: Making FastShowerCellBuilderTool const.

See merge request !20242

- Only create worker directory if it does not exist yet
- Delete worker directory if it did exist already. This is required as
  the THistSvc crashes on `io_reinitialize` in case a ROOT histogram
  file already exists.

RecTPCnv: Fix clang warnings.

See merge request !20245

AthenaKernel: Fix gcc9 warnings.

See merge request !20192

Identifier: Fix gcc9 warnings.

See merge request !20246

Fix for ATLASRECTS-4815

Closes ATLASRECTS-4815

See merge request !20251

MdtCalibrationT0ShiftSvc and MdtCalibrationTMaxShiftSvc use the updated version of MuonMDT_Cabling->getCabling() that returns a pointer rather than a DataHandle.

In C++11, implicit declarations of copy and assignment are deprecated if the
class has a user defined destructor or copy or assignment.  gcc9 now warns
about this by default.
Adjust to avoid the warning.

clang warnings: unused private class members.

In C++11, implicit declarations of copy and assignment are deprecated if the
class has a user defined destructor or copy or assignment.  gcc9 now warns
about this by default.
Adjust to avoid the warning.

Remove some unused code.

Hide function names in error messages for the unit test, to prevent spurious
miscompares in clang builds.

Advance on deserialisation of Trigger EDM from the HLTResultMT

See merge request !20161

Cleanup TrigT1NSWSimTools

See merge request !20198

Sweeping !20024 from 21.3 to master.
Adding MM and STGC clusterization packages for the NSW, with interfaces and example tools

See merge request !20208

Sweeping !20075 from 21.3 to master.
Add Muon ART Tests for Standalone Setup and NSW

See merge request !20210

Code cleanup of SCTCalib (ATLASRECTS-4575)

See merge request !20212

TileConditions, etc: Make ITileCondToolOfc::getOfcWeights const.

See merge request !20206

TrigMETMonitoring: Fix clang warnings.

See merge request !20205

TrigValAlgs: cmake fix

See merge request !20204

TrigEFMissingET: cmake fixes

See merge request !20203

InDetD3PDMaker: cmake fix.

See merge request !20202

CxxUtils: Fix thread-safety checker warnings.

See merge request !20200

Update packages:TrigEgammaEmulationTool TrigEgammaMatchingTool…

See merge request !20146

SCT_CalibAlgs: Fix clang warnings.

See merge request !20201

CoreDumpSvc: proper handling of crashes before first event in MT

See merge request !20191