[Missing]: Remove shard does not handle jumbo chunks

The current implementation of removing shards does not handle jumbo chunks at all.
According to [the docs](https://www.mongodb.com/docs/v6.0/tutorial/remove-shards-from-cluster/#check-the-status-of-the-migration), there should be a handling of the jumbo chunks, otherwise the removal of the shard will never end.
[The docs](https://www.mongodb.com/docs/v6.0/tutorial/clear-jumbo-flag/) provide some information on how to handle jumbo chunks, and this should be implemented otherwise the cluster would get stuck in draining mode forever / until manual intervention of the operator.

Start by locating the current shard-removal implementation and compare its behavior with the linked MongoDB documentation on checking migration status and clearing the jumbo flag. Done means jumbo chunks are handled during shard removal so the cluster does not remain in draining mode indefinitely.

Written by the indexing model from the issue text.