Duplicate implementation of git-archive-all

[jorisv]

git-archive-all.sh and git-archive-all.py are both used by dist.cmake to create tar.gz archive of the sources with submodules.

The bash one is used on Windows and Linux, the Python one is used on MacOS.

Is there any reason to maintains both scripts ? If not, we can maybe use the Python script on all platform.

[nim65s]

I'm using https://github.com/Kentzo/git-archive-all both on linux and macos without issues, so yes, I think we can keep only the python version (and maybe consider updating it from upstream)