**Describe the issue**
Can't insert `String` data to column with `LowCardinality` type.

Starting from 21.1 this query fails

**How to reproduce**
```sql
CREATE TABLE default.lc_test
(   
    `id` LowCardinality(String)
)
ENGINE = MergeTree
PARTITION BY tuple()
ORDER BY id;

Ok.
0 rows in set. Elapsed: 0.003 sec.


insert into lc_test values (toString('a'));
Exception on client:
Code: 49. DB::Exception: Bad cast from type DB::ColumnString to DB::ColumnLowCardinality: data for INSERT was parsed from query

```

**Additional context**
related to issue https://github.com/DarkWanderer/ClickHouse.Client/issues/66

version 20.12 ok
{
    
    auto settings = context->getSettingsRef();
    if (templates[column_idx]->parseExpression(buf, format_settings, settings))
    {
        ++rows_parsed_using_template[column_idx];
        return true;
    }
    
    
    if (column->empty())
        column = IColumn::mutate(templates[column_idx]->evaluateAll(block_missing_values, column_idx));
    else
    {
        ColumnPtr evaluated = templates[column_idx]->evaluateAll(block_missing_values, column_idx, column->size());
        column->insertRangeFrom(*evaluated, 0, evaluated->size());
    }
    
    templates[column_idx].reset();
    buf.rollbackToCheckpoint();
    
    return parseExpression(*column, column_idx);
}
bool ValuesBlockInputFormat::tryReadValue(IColumn & column, size_t column_idx)