chore: Make modeled errors Sendable #4066

Job	Run time
apple (macos-14, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	7m 20s
apple (macos-14, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	5m 46s
apple (macos-14, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	8m 8s
apple (macos-14, Xcode_15.2, platform=macOS)	9m 17s
apple (macos-15, Xcode_16.1, platform=iOS Simulator,OS=18.1,name=iPhone 16)	14m 53s
linux (jammy, 5.9)	17m 57s
apple (macos-15, Xcode_16.1, platform=tvOS Simulator,OS=18.1,name=Apple TV 4K (3rd generation) (a...	10m 13s
linux (jammy, 6.0)	14m 38s
apple (macos-15, Xcode_16.1, platform=visionOS Simulator,OS=2.1,name=Apple Vision Pro)	7m 35s
apple (macos-15, Xcode_16.1, platform=macOS)	9m 53s
	1h 45m 40s

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