Submit tasks to the CollectionRangeDeleter when config.rangeDeletions is updated

In the ShardServerOpObserver::onUpdates function, if we observe an update to config.rangeDeletions removing the "prepare" field, we should call CollectionShardingRuntime::cleanupRange for the range specified in the document.

We can test this independently with a jstest:

1. Insert orphans directly into a shard
2. Insert a document directly into config.rangeDeletions
3. Assert that orphans eventually are removed.