integrate auxiliary cmake repositories

The CMake structure should be adapted using the new repos added like this:

git subrepo clone https://git.ufz.de/chs/cmake-fortran-scripts.git cmake -b v1.1 -f
git subrepo clone https://git.ufz.de/chs/HPC-Fortran-module-loads.git hpc-module-loads -b v1.1 -f