reshardingMinimumOperationDurationMillis is set to 5 minutes to allow users to do retry reads and writes on the collection before it is dropped. While this is good for production environments, it makes doing a dry run for resharding a 5 minute long process.
Introduce a parameter, demoMode, in reshardCollection that allows users to do a quick test/demo of resharding without waiting 5 minutes.

It would be nice if it didn’t have to wait for 30 seconds (default value of reshardingDelayBeforeRemainingOperationTimeQueryMillis) either but we shouldn't compromise on success rate of resharding