We had initially selected unawaited_futures for inclusion in core lints, however ran into some issues that need resolving first, including:

• method-side opt-out for unawaited_futures sdk#58348, Method-side opt-out for unawaited_futures
• Move unawaited to package:meta? sdk#58351, Move unawaited to package:meta
• Enable the lint in the flutter codebase for dogfooding (opting out some Navigator and AnimationController methods, maybe others)