Actual Behavior

The documentation has misleading information regarding the argument set of citus_rebalance_start, i.e., it lists the arguments threshold, drain_only and rebalance_strategy as opposed to the actual argument set rebalance_strategy, drain_only and shard_transfer_mode, in the given order.

Desired Behavior

We should copy over the documentation regarding shard_transfer_mode from d1ff979, if the functionality has not changed, to the arguments of citus_rebalance_start and remove the non-existing threshold from the docs.

I can create a PR if desired.

/cc @begriffs, @jonels-msft.