**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))



for (const auto & name : required_columns)
                prewhere_info->prewhere_actions->tryRestoreColumn(name);
            auto analyzed_result
                = TreeRewriter(context).analyze(required_columns_from_prewhere_expr, metadata_snapshot->getColumns().getAllPhysical());
            prewhere_info->alias_actions
                = ExpressionAnalyzer(required_columns_from_prewhere_expr, analyzed_result, context).getActionsDAG(true, false);
            
            auto required_columns_from_alias = prewhere_info->alias_actions->getRequiredColumns();
            Block prewhere_actions_result = prewhere_info->prewhere_actions->getResultColumns();
            for (auto & column : required_columns_from_alias)
                if (!prewhere_actions_result.has(column.name))
                    if (required_columns.end() == std::find(required_columns.begin(), required_columns.end(), column.name))
                        required_columns.push_back(column.name);
            
            for (const auto & column : required_columns_from_prewhere)
                if (required_aliases_from_prewhere.count(column) == 0)
                    if (required_columns.end() == std::find(required_columns.begin(), required_columns.end(), column))
                        required_columns.push_back(column);
        }
    }
}
void InterpreterSelectQuery::executeFetchColumns(QueryProcessingStage::Enum processing_stage, QueryPlan & query_plan)
{
    auto & query = getSelectQuery();
    const Settings & settings = context->getSettingsRef();
    
    bool optimize_trivial_count =
        syntax_analyzer_result->optimize_trivial_count
        && (settings.max_parallel_replicas <= 1)
        && storage