Install xcbeautify on macOS images

[allenhumphreys]

xcbeautify is a modern alternative to xcpretty which hasn't seen updates on the official git repository since 2018. For all intents and purposes, xcbeautify is a replacement for xcpretty. Bitrise uses xcbeautify by default for all of their Xcode actions. Inclusion of this tool is a must for modern Xcode CI/CD.

[allenhumphreys]

This was requested via an Issue in the past #6657

I think it warrants revisiting given the state-of-the-art in the Apple platforms community of developers doing automation.