Collapse consecutive assertions

[timtebeek]

hi! I've recently expanded the recipe we have to collapse consecutive assertions into chained assertions:

• https://docs.openrewrite.org/recipes/java/testing/assertj/collapseconsecutiveassertthatstatements
• Collapse more consecutive assertions openrewrite/rewrite-testing-frameworks#769
• Retain comments when chaining assertions openrewrite/rewrite-testing-frameworks#775

This PR updates the examples to use that format where possible once more, as we did previously for simpler cases:

• Collapse consecutive assertThat statements using the same object #65

My hope is tis helps folks once more to see what assertions can be chained, and the benefits of doing so.

[scordio]

Thanks, @timtebeek!