CompositeFuture should support custom future implementations #2192

Job	Run time
CI (ubuntu-latest, 11) / Run tests	12m 6s
CI (ubuntu-latest, 11, -PNativeIoUring) / Run tests	11m 38s
CI (ubuntu-latest, 11, -PNativeEpoll) / Run tests	11m 45s
CI (ubuntu-latest, 11, -PNativeEpoll+DomainSockets) / Run tests	11m 7s
CI (ubuntu-latest, 21) / Run tests	11m 0s
CI (windows-latest, 11, true) / Run tests	15m 26s
Deploy	0s
	1h 13m 2s

Provide feedback