**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))



#include <Processors/QueryPlan/TotalsHavingStep.h>
#include <Processors/Transforms/DistinctTransform.h>
#include <Processors/QueryPipelineBuilder.h>
#include <Processors/Transforms/TotalsHavingTransform.h>
#include <Interpreters/ExpressionActions.h>
#include <IO/Operators.h>
#include <Common/JSONBuilder.h>
namespace DB
{
static ITransformingStep::Traits getTraits(bool has_filter)
{
    return ITransformingStep::Traits
    {
        {
            .preserves_distinct_columns = true,
            .returns_single_stream = true,
            .preserves_number_of_streams = false,
            .preserves_sorting = true,
        },
        {
            .preserves_number_of_rows = !has_filter,
        }
    };
}
TotalsHavingStep::TotalsHavingStep(