**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))



{
    auto expression_actions = actions_dag ? std::make_shared<ExpressionActions>(actions_dag, settings.getActionsSettings()) : nullptr;
    auto totals_having = std::make_shared<TotalsHavingTransform>(
        pipeline.getHeader(),
        overflow_row,
        expression_actions,
        filter_column_name,
        totals_mode,
        auto_include_threshold,
        final);
    pipeline.addTotalsHavingTransform(std::move(totals_having));
}
static String totalsModeToString(TotalsMode totals_mode, double auto_include_threshold)
{
    switch (totals_mode)
    {
        case TotalsMode::BEFORE_HAVING:
            return "before_having";
        case TotalsMode::AFTER_HAVING_INCLUSIVE:
            return "after_having_inclusive";
        case TotalsMode::AFTER_HAVING_EXCLUSIVE:
            return "after_having_exclusive";
        case TotalsMode::AFTER_HAVING_AUTO:
            return "after_having_auto threshold " + std::to_string(auto_include_threshold);
    }
    __builtin_unreachable();
}
void TotalsHavingStep::describeActions(FormatSettings & settings) const