Delete associated ledgers before deleting cluster metadata (#8244)

### Motivation

#8169 introduced a command tool to delete a cluster's metadata from ZK. This PR intends to delete the cluster's ledgers from BK.

### Modifications

- Retrieve ledger ids from related ZK nodes
- Add an optional argument to specify BK metadata service URI, then delete these ledgers if it's specified
4 files changed
tree: d4af68564b9a976e88910476be5d812b77ec2f1b
  1. distribution/
  2. docker/
  3. tests/