Avoid `MainActor.assumeIsolated` #997

Job	Run time
Discover Typos	10s
Build Integration Examples (iOS)	1m 0s
Build Demo (iOS)	57s
Build Demo (tvOS)	37s
Unit Tests (iOS 16.4, Xcode 14.3.1)	3m 47s
Unit Tests (iOS 16.2, Xcode 14.2)	3m 28s
Unit Tests (macOS, Xcode 14.3.1)	1m 24s
Swift Build (SPM)	1m 8s
Unit Tests (tvOS 16.4, Xcode 14.3.1)	2m 27s
Run Build (watchOS 9.2, Xcode 14.2)	6s
	15m 4s

Provide feedback