StoredMaterialManager: make getMaterial non-const

First step in making StoredMaterialManager const-correct ("thread-safe") and remove mutables. Make the StoredMaterialManager::getMaterial interface non-const as it modifies the list of materials.

The first commit is the actual interface change. All the remaining commits are just trivial changes in clients (e.g. const StoredMaterialManager* -> StoredMaterialManager*) and were mostly done by search&replace.

The remaining interfaces will be fixed in separate MRs.

This was discussed with @tsulaia and @ssnyder on !54024 (closed).

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

100K in file LArCalorimeter/LArGeoModel/LArGeoBarrel/src/BarrelDMConstruction.cxx

140K in file TileCalorimeter/TileGeoModel/src/TileGeoSectionBuilder.cxx

112K in file InnerDetector/InDetDetDescr/PixelGeoModel/src/OraclePixGeoManager.cxx

104K in file LArCalorimeter/LArGeoModel/LArGeoBarrel/src/BarrelConstruction.cxx

148K in file TileCalorimeter/TileGeoModel/src/TileAtlasFactory.cxx

This merge request affects 40 packages. Since this is a long list, it will not be printed.

Adding @jchapman ,@goetz ,@rosati ,@wleight ,@solodkov ,@stavrop ,@pavol ,@battagl ,@sroe ,@harkusha ,@cgrefe ,@jojungge ,@calfayan ,@stsuno ,@egodden ,@lshan ,@rbianchi as watchers

added ForwardDetectors Geometry InnerDetector JetEtmiss LAr MuonSpectrometer Simulation Tile master review-pending-level-1 labels

mentioned in merge request !54024 (closed)

CI Result SUCCESS (hash a7c86c28)

	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 53806]

Changes and CI look fine. Approving. L1

removed review-pending-level-1 label

added review-approved label

merged

mentioned in commit 64d6df7e

mentioned in merge request !54097 (merged)

added sweep:ignore label