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