**Describe what's wrong**

Query with rollup using same selected field name as the name of underlying column reports structure mismatch

**Does it reproduce on recent release?**

yes

**How to reproduce**

`21.9.2.17`

```sql
CREATE TABLE test
(
    `d` DateTime,
    `a` LowCardinality(String),
    `b` UInt64
)
ENGINE = MergeTree
PARTITION BY toDate(d)
ORDER BY d;

SELECT *
FROM (
    SELECT
        a,
        max((d, b)).2 AS value
    FROM test
    GROUP BY rollup(a)
)
WHERE a <> '';
```

**Expected behavior**

This used to return an ok result on v21.8

**Error message and/or stacktrace**

> Code: 352. DB::Exception: Block structure mismatch in (columns with identical name must have identical structure) stream: different columns:
> notEquals(a, '') LowCardinality(UInt8) ColumnLowCardinality(size = 0, UInt8(size = 0), ColumnUnique(size = 1, UInt8(size = 1)))
> notEquals(a, '') LowCardinality(UInt8) Const(size = 0, ColumnLowCardinality(size = 1, UInt8(size = 1), ColumnUnique(size = 2, UInt8(size = 2)))). (AMBIGUOUS_COLUMN_NAME) (version 21.9.2.17 (official build))



return;
    auto finalized = chunk.clone();
    if (final)
        finalizeChunk(finalized);
    total_keys += finalized.getNumRows();
    if (filter_column_name.empty())
    {
        addToTotals(chunk, nullptr);
        chunk = std::move(finalized);
    }
    else
    {
        
        const auto & cur_header = final ? finalized_header : getInputPort().getHeader();
        size_t num_rows = finalized.getNumRows();
        auto finalized_block = cur_header.cloneWithColumns(finalized.detachColumns());
        for (const auto & action : expression->getActions())
        {
            if (action.node->type == ActionsDAG::ActionType::ARRAY_JOIN)
                throw Exception("Having clause cannot contain arrayJoin", ErrorCodes::ILLEGAL_COLUMN);
        }
        expression->execute(finalized_block, num_rows);
        auto columns = finalized_block.getColumns();
        ColumnPtr filter_column_ptr = columns[filter_column_pos];
        ConstantFilterDescription const_filter_description(*filter_column_ptr);
        if (const_filter_description.always_true)
        {
            addToTotals(chunk, nullptr);
            chunk.setColumns(std::move(columns), num_rows);
            return;