Currently the clearjumboflag command can be used to clear the jumbo flag for a specific chunk.

In some scenarios we would need to clear the jumbo flag for multiple chunks. e.g. clearing the jumbo flag for all the jumbo chunks on the draining shard, so that the balancer can move these chunks off the draining shard.

In such case, we would need to check the chunks metadata to find out all the jumbo chunks, and then run clearjumboflag for each jumbo chunk. It would be nice if we can support clearing jumbo flag for all the chunks in one command (maybe also support clearing jumbo flag for all the jumbo chunks in a specific collection, or on a specific shard).