Change the behavior of awaitXX functions for the cancellation token.

[EdmondDantes]

At the moment, functions like awaitAll and others throw an exception if they are canceled by a cancellation token. This behavior leads to a situation where, even if we have a partial result, we cannot analyze it.

However, it’s often useful to be able to analyze the partial result while still stopping the operation.

Task: we need to change the behavior so that instead of throwing an exception, a third parameter is returned.