Continuous Integration: Added build and deployment of Windows installer to the release workflow

[t20100]

Checklist:

• [x] The PR title is formatted as: <Module or Topic>: <Action> <Summary> (see contributing guidelines)

---

Merge PR #4112 first!

This PR adds the build, test and deployment to github release assets of Windows "fat binaries" to the release workflow. This is one more step to further automate the release process and allows to completely stop using the previous release CI.

It also removes the update of sphinx-panels which is no longer used.