clang-tidy: Fix readability-static-accessed-through-instance

.clang-tidy

Source/CPack/IFW/cmCPackIFWPackage.cxx

Source/CPack/cmCPackNSISGenerator.cxx

Source/CTest/cmCTestGIT.cxx

Source/CTest/cmCTestHG.cxx

Source/CTest/cmCTestSVN.cxx

Source/CTest/cmCTestScriptHandler.cxx

Source/CTest/cmCTestStartCommand.cxx

Source/CTest/cmCTestVC.cxx

Source/QtDialog/AddCacheEntry.cxx

Source/QtDialog/CMakeSetup.cxx

Source/QtDialog/QCMakeCacheView.cxx

Source/cmCTest.cxx

Source/cmCacheManager.cxx

Source/cmExportInstallFileGenerator.cxx

Source/cmExtraEclipseCDT4Generator.cxx

Source/cmGlobalGenerator.cxx

Source/cmGlobalNinjaGenerator.cxx

Source/cmInstallCommandArguments.cxx

Source/cmJsonObjects.cxx