Use JReleaser to create GitHub releases (and git tags)

[marko-bekhta]

Currently, we have a dedicated custom scripts to:

• create GitHub releases https://github.com/hibernate/hibernate-release-scripts/blob/main/github-release.sh
• create/push tags (either a script or a custom build step for ORM/Reactive)

With JReleaser we can delegate both tasks to it and at the same time enable GitHub releases for other projects.

See also:

• https://jreleaser.org/guide/latest/reference/release/github.html