[Chore] Prepare new releases

Description

We have deprecated some stuff recently, so it'd be nice to make new releases sooner than later because we want to remove that stuff at some point. And in general there are quite a lot of changes already. So it's a routine MR that I need in order to make new releases.

There is also one small clean-up commit.

Related issue(s)

None

✅ Checklist for your Merge Request

Related changes (conditional)

• Tests (see short guidelines)

  • If I added new functionality, I added tests covering it.
  • If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.

• Documentation

  • I checked whether I should update the docs and did so if necessary:
    • Root README and other README.md files
    • Haddock
    • docs/
  • I updated changelog files of all affected packages released to Hackage if my changes are externally visible.

Stylistic guide (mandatory)

• My commits comply with the following policy.
• My code complies with the style guide.