Looks like https://github.com/ClickHouse/ClickHouse/pull/21303 is broke also "clear column" for such columns.

How to reproduce:

```
CREATE TABLE test.TTAdmLog
(
    `ts` DateTime,
    `event_date` Date DEFAULT toDate(ts),
    `impression_id` String DEFAULT '',
    `creative_id` String DEFAULT '',
    `creative_adm` String DEFAULT '',
    `impression_id_compressed` FixedString(16) DEFAULT UUIDStringToNum(impression_id),
    `impression_id_hashed` UInt16 DEFAULT reinterpretAsUInt16(impression_id_compressed),
)
ENGINE = ReplicatedMergeTree('/clickhouse/tables/{shard}/TTAdmLogTest', '{replica}')
PARTITION BY toMonday(event_date)
ORDER BY (event_date, impression_id_hashed)
SAMPLE BY impression_id_hashed
SETTINGS replicated_deduplication_window = 1000, replicated_deduplication_window_seconds = 864000, index_granularity = 8192

CREATE MATERIALIZED VIEW test.TTView
(
    `event_date` Date,
    `creative_id` String,
    `creative_adm` AggregateFunction(anyLast, String),
)
ENGINE = ReplicatedAggregatingMergeTree('/clickhouse/tables/{shard}/TTViewTest', '{replica}', event_date, (event_date, creative_id), 8192) AS
SELECT 
    toStartOfMonth(event_date) AS event_date,
    arrayJoin(splitByChar(',', creative_id)) AS creative_id,
    anyLastState(creative_adm) AS creative_adm,
FROM test.TTAdmLog
GROUP BY 
    event_date,
    creative_id,

```


ClickHouse server version 20.9.3 revision 54439.

```
alter table test.TTAdmLog clear column creative_adm in partition '2021-03-22'

OK

```
ClickHouse server version 21.4.3 revision 54447.

```
alter table test.TTAdmLog  clear column creative_adm in partition '2021-03-22'

DB::Exception: Trying to ALTER DROP column creative_adm which is referenced by materialized view ['TTView'].

```

if (!skip_intersecting_parts)
                    throw Exception(error, ErrorCodes::LOGICAL_ERROR);
                LOG_WARNING(log, error);
            }
            continue;
        }
        
        if (part->info.min_block > drop_range.max_block)
            break;
        if (part->info.min_block <= drop_range.max_block && drop_range.max_block < part->info.max_block)
        {
            
            String error = "Unexpected merged part " + part->name + " intersecting drop range " + drop_range.getPartName();
            if (!skip_intersecting_parts)
                throw Exception(error, ErrorCodes::LOGICAL_ERROR);
            LOG_WARNING(log, error);
            continue;
        }
        if (part->getState() != DataPartState::Deleting)
            parts_to_remove.emplace_back(part);
    }
    removePartsFromWorkingSet(parts_to_remove, clear_without_timeout, lock);
    return parts_to_remove;
}
void MergeTreeData::forgetPartAndMoveToDetached(const MergeTreeData::DataPartPtr & part_to_detach, const String & prefix, bool
restore_covered)
{
    LOG_INFO(log, "Renaming {} to {}{} and forgetting it.", part_to_detach->relative_path, prefix, part_to_detach->name);
    auto lock = lockParts();
    auto it_part = data_parts_by_info.find(part_to_detach->info);