ci: Minor CI improvements

[calvincestari]

Closes #2410

• replaces xcpretty with xcbeautify - the xcpretty project looks like it's been abandoned; multiple outstanding issues and PRs with the last update being 4 years ago. This issue highlights the problem in parallelized test runs and xcbeautify is one of the recommended alternatives including being favoured by FastLane. I looked at the project and it seems overall like a good replacement; written in Swift, better performance, and supports parallelized test runs. You can see the xcbeautify output in the CI output for this PR.
• added a separate step for the JS frontend tests which is only included in the CodegenLib test job.

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[AnthonyMDev]

Thank you!