WIP: Better Catalyst build support

[dpogue]

Platforms affected

iOS, macOS

Motivation and Context

With the deprecation of cordova-osx and the availability of Catalyst to deploy iOS apps on macOS as their own app bundles, we should support targeting Catalyst builds.

Description

After the work in #1310 caused the build output folder to be named based on the platform, I realized this actually solved one of the remaining questions around where to put Catalyst output files... now they end up in build/Debug-maccatalyst or build/Release-maccatalyst

We detect if we are building for Catalyst (as opposed to iOS Device vs iOS Simulator) by the --target=mac option.

Testing

cordova build ios --target=mac works cordova run ios --target=mac works

Checklist

• [ ] I've run the tests to see all new and existing tests pass
• [ ] I added automated test coverage as appropriate for this change
• [ ] I've updated the documentation if necessary

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 23.33333% with 23 lines in your changes are missing coverage. Please review.

Project coverage is 77.93%. Comparing base (f7e2953) to head (368f216).

Files	Patch %	Lines
lib/run.js	5.26%	18 Missing :warning:
lib/build.js	54.54%	5 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1313 +/- ## ========================================== - Coverage 78.35% 77.93% -0.43% ========================================== Files 16 16 Lines 1825 1840 +15 ========================================== + Hits 1430 1434 +4 - Misses 395 406 +11 ```

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