Complete the following user stories:

• As a shard, upon movePrimary commit, for each tracked collection that has no chunks on the new DB primary shard, I persist a <0,0> tracked token (collection metadata with an empty chunk set) to the shard catalog on the new DB primary.
• As a shard, upon movePrimary commit, for each tracked collection with a new <0,0> tracked token, I emit an oplog 'c' entry so secondaries install the collection in their CSS. (invalidate only)