This PR remove some manual steps from the release process.
In particular

- create release tag
- create release
- upload artifacts
- upload the titles and links of the PRs since last release, for further
human processing

Because the release process is rare, this PR introduce a running draft
release called nightly, which runs the automated steps on a running tag
that gets rewritten every day.

More work should be done to
- collect automatically the dockerhub image link.
- collect the bump.sh to the current change

ADP-3400