Add ability to export with Xcode Cloud

[AndreasInk]

I haven't tested this yet, so it might not even be needed, but it would be nice to have this work in Xcode Cloud, especially for teams but could be helpful for indies too especially now that we all get free hours for Xcode Cloud.

This repo may be helpful for figuring this out...
https://github.com/invia-flights/swift-xcode-cloud-snapshot-testing/blob/main/Sources/XcodeCloudSnapshotTesting/CIAssertSnapshot.swift

This could could be as simple as saving the images in the XCResult or even connecting to the App Store Connect API (not likely but maybe).