[CK2/CM scripts] add system deps to install-python-src and install-python-venv
Add either complete system deps (get-sys-utils-cm) or minimal for python (new script) when building python from sources on UBUNTU and MacOS. We can skip this dependency with --skip-system-deps flag (already added).
@arjunsuresh - let's discuss how to do it ...
See https://stackoverflow.com/questions/59690698/modulenotfounderror-no-module-named-lzma-when-building-python-using-pyenv-on
Actually, as discussed today, we should create "get-sys-utils" script with variations per tool (_cmake,_lzma, ...) that will be reused by everyone. The idea is to provide scripts specific to different OS that will handle system installation for those variations ...
For now we added all deps to get-sys-utils-cm . We will reopen this ticket if needed ...