As part of the new shard versioning protocol used in authoritative shards we need to wait for a given timestamp to be replicated and majority available.

The need for not making this a blocking call and resuing the existing wait mechanism is because the protocol requires a concurrent wait on this condition as well as on a shard version condition such that either of the two can trigger the waiter to make forward progress.

The work for the CSS waiter will be done in SERVER-119833