[CI] Automatically precompile GALAHAD when a new release is tagged

[amontoison]

@nimgould
This pull request adds a script that automatically creates a new GitHub release with precompiled binaries for your convenience.
This means that you only need to tag the latest commit on the branch master to trigger the action.

git checkout master
git tag <tagname>
git push origin --tags

Note: <tagname> must have a 'v' as the first character, such as v1.0.0 or v2024.01.18.

@jfowkes, could you please explain what you did with SPRAL as an example to Nick when you both are at RAL?

[jfowkes]

@amontoison will do, but we should probably make sure that the binaries actually compile first...

[nimgould]

I agree, slightly premature particularly as much is adapting to _64

[amontoison]

Jari, it's almost a copy-paste of the build_tarballs.jl that I use with Yggdrasil.

But I will trigger the action of my fork to check if everything work fine.

[amontoison]

@jfowkes @nimgould
Tested on my fork: https://github.com/amontoison/GALAHAD/releases/tag/v5.0.0 🎉