Revert "Eagerly move attachable values to the heap. (#809)"#810

grynspan merged 1 commit intomainswiftlang/swift-testing:mainfrom

jgrynspan/revert-3a537b8f4b590ae868e563276b7d45d0503034e3swiftlang/swift-testing:jgrynspan/revert-3a537b8f4b590ae868e563276b7d45d0503034e3Copy head branch name to clipboard