This allows CPUs to operate at a higher clock rate, to speed up CPU-bound calculations

- Replace uses of distutils, which has been deprecated for a long time and has
been removed from Python 3.12
- Change is_newer behaviour to check the source timestamp against that of the
target
- Replace remove_directories by shutil.rmtree
- Replace copy_file by shutil.copy2
- Move add_to_list to parser_fortran.py
- Remove unused functions
- Fix various issues

The wrappers are now generated correctly with F2PY from version 1.24.0 onwards.
Versions 1.21.x and lower are also still supported.

However, versions 1.22.x and 1.23.x do not work due to an F2PY issue, see here:
https://github.com/numpy/numpy/issues/21892

- Remove obsolete systel configuration files
- Update pysource templates
- Add Debian and Windows systel files

- Remove S9 configurations
- Remove HDF5 libraries from link libraries (not needed)
- Various other little tweaks

Fix issue #828

Fix issue #826