Use a new GitHub Action for creating releases

[jpraynaud]

Why

We use a not maintained GitHub Action for creating the releases in the CI/CD (release, pre-release, unstable). We want to replace it with one or multiple maintained GitHub Action(s).

What

Replace the https://github.com/marvinpinto/actions GitHub Action which is not maintained any more with a maintained action such as https://github.com/softprops/action-gh-release. We need to have an action that handles the unstable release (which needs to be updated at every merge) or use a different one for that purpose.

How

• [ ] Validate that the https://github.com/softprops/action-gh-release is a good replacement for pre-release/release
• [ ] Validate that the https://github.com/softprops/action-gh-release is a good replacement for unstable
• [ ] Check if we can have both auto-generated release note and append body (to remove the use of tubone24/update_release)?
• [ ] Update the CI/CD pipelines (testing should be done in a separate test fork/repo)