An option to create dSYM file for macOS

[nick-morhun]

Context

We received some crash reports for macOS but we cannot debug properly since we don't have the symbols.

Suggested solution

Add an option to create a dSYM file and upload xcarchive (maybe also dSYM for Unity) alongside the .app.

Considered alternatives

Building without unity-builder.

Additional details

Found some mention in Unity docs: https://docs.unity3d.com/ru/2017.4/Manual/UnityPerformanceReportingFindingiOSSymbols.html

The symbols should be useable as described in https://developer.apple.com/documentation/xcode/adding-identifiable-symbol-names-to-a-crash-report#Symbolicate-the-crash-report-in-Xcode

https://developer.apple.com/documentation/xcode/building-your-app-to-include-debugging-information#Publish-your-app-with-symbol-information