version 21.5.5.12 (official build)

I'm trying to change data type for a column that is used in the TTL expression.
It works well when the table is empty.
When the table is not empty, the mutation fails.
As a result the table ends up in an inconsistent state.

```
create table test
(
InsertionDateTime DateTime,
TTLDays Int32 DEFAULT CAST(365, 'Int32')
)
Engine=MergeTree()
order by tuple()
TTL InsertionDateTime + toIntervalDay(TTLDays);

Ok.

insert into test values (now(), 23);

Ok.

ALTER TABLE test modify column TTLDays Int16 DEFAULT CAST(365, 'Int16');

Code: 341, e.displayText() = DB::Exception: Exception happened during execution of mutation 'mutation_2.txt' with part 'all_1_1_0' reason: 'Code: 10, e.displayText() = DB::Exception: Not found column InsertionDateTime in block. There are only columns: TTLDays (version 21.5.5.12 (official build))'. This error maybe retryable or not. In case of unretryable error, mutation can be killed with KILL MUTATION query (version 21.5.5.12 (official build)) [DB Errorcode=341]

insert into test values (now(), 23);

Ok.

select table, column, type, sum(rows) rows, sum(column_bytes_on_disk) on_disk
from system.parts_columns where column like 'TTLDays'
group by database, table, column, type

table | column  | type  | rows | on_disk
------+---------+-------+------+--------
test  | TTLDays | Int32 |    1 |      86
test  | TTLDays | Int16 |    1 |      84
```
mutateAllPartColumns(
            new_data_part,
            metadata_snapshot,
            part_indices,
            part_projections,
            in,
            time_of_mutation,
            compression_codec,
            merge_entry,
            need_remove_expired_values,
            need_sync,
            space_reservation,
            holder,
            context);
        
        
    }
    else 
    {
        
        NameSet updated_columns;
        if (mutation_kind != MutationsInterpreter::MutationKind::MUTATE_INDEX_PROJECTION)
        {
            for (const auto & name_type : updated_header.getNamesAndTypesList())
                updated_columns.emplace(name_type.name);
        }
        auto indices_to_recalc = getIndicesToRecalculate(
            in, updated_columns, metadata_snapshot, context, materialized_indices, source_part);
        auto projections_to_recalc = getProjectionsToRecalculate(
            updated_columns, metadata_snapshot, materialized_projections, source_part);