Ensure Coordinator Began Resharding Before setFCV in setfcv_reshard_collection.js

setfcv_reshard_collection.js contains two test cases, one testing lastLTSFCV and another testing latestFCV. The first of these will wait to ensure that the resharding coordinator has started before sending the set FCV command, while the second does not. This means that for the latestFCV case, it's possible that the FCV is set before the resharding operation begins on the config server, therefore causing the resharding operation to miss getting aborted during the upgrade procedure as seen in BF-25353.