Add key test #4427

Job	Run time
build (stable, examples/counter)	1m 11s
build (stable, examples/marvel)	1m 7s
build (stable, examples/pub)	1m 28s
build (stable, examples/random_number)	1m 9s
build (stable, examples/stackoverflow)	1m 13s
build (stable, examples/todos)	1m 9s
build (stable, packages/riverpod)	3m 7s
build (stable, packages/riverpod/example)	1m 11s
build (stable, packages/flutter_riverpod)	1m 46s
build (stable, packages/flutter_riverpod/example)	1m 6s
build (stable, packages/hooks_riverpod)	1m 34s
build (stable, packages/hooks_riverpod/example)	1m 12s
build (stable, packages/riverpod_annotation)	1m 3s
build (stable, packages/riverpod_generator)	2m 6s
build (stable, packages/riverpod_generator/integration/build_yaml)	2m 9s
build (stable, website)	1m 6s
build (master, examples/counter)	2m 7s
build (master, examples/marvel)	1m 35s
build (master, examples/pub)	1m 48s
build (master, examples/random_number)	1m 51s
build (master, examples/stackoverflow)	1m 38s
build (master, examples/todos)	1m 29s
build (master, packages/riverpod)	3m 37s
build (master, packages/riverpod/example)	1m 42s
build (master, packages/flutter_riverpod)	1m 49s
build (master, packages/flutter_riverpod/example)	1m 44s
build (master, packages/hooks_riverpod)	1m 47s
build (master, packages/hooks_riverpod/example)	1m 31s
build (master, packages/riverpod_annotation)	1m 6s
build (master, packages/riverpod_generator)	2m 13s
build (master, packages/riverpod_generator/integration/build_yaml)	2m 3s
build (master, website)	1m 54s
	53m 31s

Provide feedback