docs: Remove rspec from the beginner's guide
We no longer have rspec tests (in use), so remove documentation about those. While at it, restructure the text a bit.
Issue: #4742 (closed)
Epic: &2862 (closed)
We no longer have rspec tests (in use), so remove documentation about those. While at it, restructure the text a bit.
Issue: #4742 (closed)
Epic: &2862 (closed)