Every time the coordinator wants a set of shards (donor/recipient) to be aware of changes, it should:

1. Take one chunk from every shard for a collection (original/temporary)
2. Set that chunk version to currentMaxVersion + 1

So that every shard will have a "shard version" of [currentMaxVersion + 1], where a "shard version" is the maximum chunk version existing on that shard for a collection.

This can be done in the update methods in the ReshardingCoordinatorService