We use Clickhouse version 22.3.3.44, and met with with some wrong behaviour - 
queries "ALTER TABLE ... MODIFY COMMENT ... " does not work on ReplicatedMergeTree engine.

Bug reproduce script:
```
CREATE TABLE sandbox.test__calendar
(
    `dttm` DateTime COMMENT 'date and time',
    `timestamp` Int64 COMMENT 'event timestamp',
    `year_num` Int32 COMMENT 'year number'
)
ENGINE = ReplicatedMergeTree() PARTITION BY year_num ORDER BY timestamp
COMMENT 'Comment text for test table';

SELECT comment FROM system.tables WHERE name like 'test__calendar'; -- 1 row selected with correct comment text

ALTER TABLE sandbox.test__calendar MODIFY COMMENT 'Some new more detailed text of comment';

SELECT comment FROM system.tables WHERE name like 'test__calendar'; -- 1 row selected, but with OLD(!) comment text
```

Maybe it will be helpfull, ALTER TABLE query returns such result:
```
host            |status|error|num_hosts_remaining|num_hosts_active|
----------------+------+----+-----------------------+------------------+
10.7.179.41     |     0|    |                      1|                 0|
ak1-st-data-01  |     0|    |                      0|                 0|
```
if (!part)
        throw Exception(ErrorCodes::NO_SUCH_DATA_PART, "Part {} not found locally", part_name);
    if (part->uuid == UUIDHelpers::Nil)
        throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Part {} does not have an uuid assigned and it can't be moved between shards", part_name);
    ReplicatedMergeTreeMergePredicate merge_pred = queue.getMergePredicate(zookeeper);
    
    
    {
        if (partIsLastQuorumPart(part->info))
        {
            throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Part {} is last inserted part with quorum in partition. Would not be able to drop", part_name);
        }
        
        String out_reason;
        if (!merge_pred.canMergeSinglePart(part, &out_reason))
            throw Exception(ErrorCodes::PART_IS_TEMPORARILY_LOCKED, "Part is busy, reason: " + out_reason);
    }
    {
        
        checkTableStructure(to, getInMemoryMetadataPtr());
    }
    PinnedPartUUIDs src_pins;
    PinnedPartUUIDs dst_pins;
    {
        String s = zookeeper->get(zookeeper_path + "/pinned_part_uuids", &src_pins.stat);
        src_pins.fromString(s);
    }
    {
        String s = zookeeper->get(to + "/pinned_part_uuids", &dst_pins.stat);
        dst_pins.fromString(s);