Tests: Generalize test name RunCMake.MSVC{Warning => Default}Flags

Prepare to add cases for other kinds of flags.

Tests/RunCMake/CMakeLists.txt

@@ -555,10 +555,10 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "^(Cray|PGI|NVHPC|XL|XLClang|IBMClang|Fujitsu|F
   add_RunCMake_test(MetaCompileFeatures)
 endif()
 if(MSVC)
+  add_RunCMake_test(MSVCDefaultFlags)
   add_RunCMake_test(MSVCRuntimeChecks)
   add_RunCMake_test(MSVCRuntimeLibrary)
   add_RunCMake_test(MSVCRuntimeTypeInfo)
-  add_RunCMake_test(MSVCWarningFlags)
   add_RunCMake_test(MSVCDebugInformationFormat)
 endif()
 if(XCODE_VERSION)