**Use case**

Currently, `system.replicas` table has `total_replicas` and `active_replicas` columns which are useful to check/alert when some replicas are down. One problem, these columns are numbers. They tell when there is a problem, but you need to further check ZooKeeper or query all the nodes to detect what exact replicas (hosts) are down/inactive/have problems.

**Describe the solution you'd like**

Add a replicas column maybe as a map which would contain the replica name, and it's status. Or, add 2 array columns with `replica_names` and `active_replica_names`

**Alternative**

Something along the line

```sql
select path, value from system.zookeeper where path IN (
    select concat(path, '/', name) from system.zookeeper where path in (select concat(zookeeper_path, '/replicas') from system.replicas)
)
and name = 'is_active'
```
Strings block_id_paths;
    Strings part_checksums;
    std::vector<EphemeralLockInZooKeeper> ephemeral_locks;
    LOG_DEBUG(log, "Cloning {} parts", src_all_parts.size());
    static const String TMP_PREFIX = "tmp_replace_from_";
    auto zookeeper = getZooKeeper();
    String alter_partition_version_path = zookeeper_path + "/alter_partition_version";
    Coordination::Stat alter_partition_version_stat;
    zookeeper->get(alter_partition_version_path, &alter_partition_version_stat);
    
    
    
    
    MergeTreePartInfo drop_range;
    std::optional<EphemeralLockInZooKeeper> delimiting_block_lock;
    bool partition_was_empty = !getFakePartCoveringAllPartsInPartition(partition_id, drop_range, delimiting_block_lock, true);
    if (replace && partition_was_empty)
    {
        
        LOG_INFO(log, "Partition {} was empty, REPLACE PARTITION will work as ATTACH PARTITION FROM", drop_range.partition_id);
        replace = false;
    }
    if (!replace)
    {
        
        drop_range = makeDummyDropRangeForMovePartitionOrAttachPartitionFrom(partition_id);
    }
    assert(replace == !LogEntry::ReplaceRangeEntry::isMovePartitionOrAttachFrom(drop_range));
    String drop_range_fake_part_name = getPartNamePossiblyFake(format_version, drop_range);
    for (const auto & src_part : src_all_parts)