+ bugfix in check_commit_mesonh broken during last update

Update script to run all the cases in case run are stored in a
directory different from the reference directory

Add env variables and script options to define the git repository on github

Choice of the IAL version to use is now define by the content of the src/arom/ial_version.json file

Quentin 19/07/2022: add turb mesonh KTEST to test online LES diag and netCDF groups + change mesonh/aux/mode_budget to MNH/budget.f90

The budget subroutines have been cleaned
Unused subroutines in the arome directory have been removed
Minor update of the check_commit_* scripts

Documentation updated with the inclusion of the tools
Selection of subdirectories to include during copy of repository in check_commit_* scripts
 - to limit volume
 - to reduce the risk of having a broken symlink (that could happen in the build directory)
Missing quotes in prep_code

Quentin 17/06/2022: add KTEST 007_16janvier/turb3D and COLD_BUBBLE + adapt compare and check for 2D simulations

Update INSTALL_pack_mesonh for HPC
Add rain_ice_red to the list of files to be suppressed for mesonh
Add .gitignore into tracked files

prep_code used in check_commit_mesonh.sh
--expand option to expand array-syntax into do loops
preparation for other test cases inclusion

shebang for compare.py
Use of diff instead of cmp
Final message print