**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))



ExpressionActionsChain & chain, bool only_types, const Names & additional_required_columns)
{
    const auto * select_query = getSelectQuery();
    if (!select_query->prewhere())
        return nullptr;
    Names first_action_names;
    if (!chain.steps.empty())
        first_action_names = chain.steps.front()->getRequiredColumns().getNames();
    auto & step = chain.lastStep(sourceColumns());
    getRootActions(select_query->prewhere(), only_types, step.actions());
    String prewhere_column_name = select_query->prewhere()->getColumnName();
    step.addRequiredOutput(prewhere_column_name);
    const auto & node = step.actions()->findInIndex(prewhere_column_name);
    auto filter_type = node.result_type;
    if (!filter_type->canBeUsedInBooleanContext())
        throw Exception("Invalid type for filter in PREWHERE: " + filter_type->getName(),
                        ErrorCodes::ILLEGAL_TYPE_OF_COLUMN_FOR_FILTER);
    ActionsDAGPtr prewhere_actions;
    {
        
        auto tmp_actions_dag = std::make_shared<ActionsDAG>(sourceColumns());
        getRootActions(select_query->prewhere(), only_types, tmp_actions_dag);
        tmp_actions_dag->removeUnusedActions(NameSet{prewhere_column_name});
        auto required_columns = tmp_actions_dag->getRequiredColumnsNames();
        NameSet required_source_columns(required_columns.begin(), required_columns.end());
        required_source_columns.insert(first_action_names.begin(), first_action_names.end());
        
        
        for (const auto & column : additional_required_columns)