Merge branch 'IntelLLVM-Fortran-frontend-variant' into release-3.21

Merge-request: !6718

Modules/CMakeFortranCompiler.cmake.in

@@ -5,6 +5,7 @@ set(CMAKE_Fortran_COMPILER_VERSION "@CMAKE_Fortran_COMPILER_VERSION@")
 set(CMAKE_Fortran_COMPILER_WRAPPER "@CMAKE_Fortran_COMPILER_WRAPPER@")
 set(CMAKE_Fortran_PLATFORM_ID "@CMAKE_Fortran_PLATFORM_ID@")
 set(CMAKE_Fortran_SIMULATE_ID "@CMAKE_Fortran_SIMULATE_ID@")
+set(CMAKE_Fortran_COMPILER_FRONTEND_VARIANT "@CMAKE_Fortran_COMPILER_FRONTEND_VARIANT@")
 set(CMAKE_Fortran_SIMULATE_VERSION "@CMAKE_Fortran_SIMULATE_VERSION@")
 @_SET_CMAKE_Fortran_XL_CPP@
 @_SET_CMAKE_Fortran_COMPILER_ARCHITECTURE_ID@