test(stackable-versioned-macros): Use trybuild to test good/bad examples

[NickLarsenNZ]

Description

Part of stackabletech/issues#507

Some of the tests were just there to ensure code compiles, but they had no assertions.
This is a good opportunity to use trybuild to make passing and failing code examples.

I have also added docs to the trybuild.rs test which gives hints for test writers who might want to enable syntax highlighting and code completion.

Definition of Done Checklist

Reviewer

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1. Code contains useful comments
2. (Integration-)Test cases added
3. Documentation added or updated
4. Changelog updated
5. Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

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1. Feature Tracker has been updated
2. Proper release label has been added