Dont convert try catch fail when return

[Laurens-W]

What's changed?

Add check for try bodies that contain a return statement

What's your motivation?

Solves #547

• Fixes RemoveTryCatchFailBlocks should not rewrite try blocks that return #547

Anything in particular you'd like reviewers to focus on?

Anyone you would like to review specifically?

@timtebeek @protocol7

Have you considered any alternatives or workarounds?

Any additional context

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[timtebeek]

Great work already; one case was missed for nested elements. I've added a quick pattern we use more often when we want to search downwards from a particular elements to handle that correctly. See if you can work out why and how that works. :)