[system test] Failover add back KV node fails with error "buckets_shutdown_wait_failed"

1. load data and indexes
1.b. Stop mutations on the cluster
2. Failover 1 KV node
3. Add back w/ Full recovery
4. Rebalance fails

Rebalance exited with reason {buckets_shutdown_wait_failed,
[{'ns_1@172.23.106.168',
{'EXIT',

{old_buckets_shutdown_wait_failed, ["ITEM","CUSTOMER","STOCK"]}

}}]}

Failed to wait deletion of some buckets on some nodes: [{'ns_1@172.23.106.168',
{'EXIT',

{old_buckets_shutdown_wait_failed, ["ITEM","CUSTOMER", "STOCK"]}

}}]

Adding logs.