refactor: Extract documentation examples from tests

Use this link to re-run the recipe: https://app.moderne.io/recipes/org.openrewrite.java.recipes.ExamplesExtractor?organizationId=ODQ2MGExMTUtNDg0My00N2EwLTgzMGMtNGE1NGExMTBmZDkw

Co-authored-by: Moderne <team@moderne.io>

Author: timtebeek