Generalize "Work yields every N ms while waiting" pattern

[marta-lokhova]

Currently, there are multiple places in the code (ResolveSnapshotWork, GenerateBucketsWork, ConditionalWork) that implement the same pattern: run, check if ready, sleep for a short time, then wake self up (done via creating a weak pointer, initializing a lambda to wake self up, then setting up a timer to wait). We should avoid the duplication, and generalize this. For example, we already have wakeSelfUpCallback in BasicWork that can be used. Also, as this pattern seems useful, it might make sense to make it a feature of BasicWork.

[MonsieurNicolas]

I agree, this could be a simple helper added at the BasicWork layer