Merge branch 'compiler-bump-vtk9' into 'master'

Applications/ApplicationsLib/CMakeLists.txt

Applications/CLI/CMakeLists.txt

Applications/DataExplorer/DataExplorer.cmake

Applications/DataExplorer/VtkVis/CMakeLists.txt

Applications/Utils/MeshEdit/CMakeLists.txt

...tions/Utils/ModelPreparation/PartitionMesh/CMakeLists.txt

Applications/Utils/OGSFileConverter/CMakeLists.txt

Applications/Utils/Tests.cmake

MeshLib/CMakeLists.txt

ProcessLib/PhaseField/Tests.cmake

ProcessLib/TH2M/Tests.cmake

ProcessLib/ThermoMechanics/Tests.cmake

ProcessLib/ThermoRichardsMechanics/Tests.cmake

Tests/CMakeLists.txt

Tests/Data/MeshLib/Mesh3D-B.vtu

Tests/Data/TH2M/HM/flow_fully_saturated.prj

Tests/Data/TH2M/HM/flow_fully_saturated_gas.prj

...THM/Confined_Compression/THM_confined_compression_gas.prj

Tests/MathLib/Polynomials.h

Tests/MathLib/TestGaussLegendreIntegration.cpp