Performance of ORDER BY on sorting key prefix with braces is 2x slower than without due to inefficient execution plan.
Without braces:
```sql
EXPLAIN PIPELINE
SELECT
    CounterID,
    EventDate
FROM hits_v1
ORDER BY
    CounterID ASC,
    EventDate ASC

┌─explain───────────────────────────┐
│ (Expression)                      │
│ ExpressionTransform               │
│   (Sorting)                       │
│   MergingSortedTransform 19 → 1   │
│     (Expression)                  │
│     ExpressionTransform × 19      │
│       (ReadFromMergeTree)         │
│       MergeTreeInOrder × 19 0 → 1 │
└───────────────────────────────────┘
```
With braces:
```sql
EXPLAIN PIPELINE
SELECT
    CounterID,
    EventDate
FROM hits_v1
ORDER BY (CounterID, EventDate) ASC

┌─explain────────────────────────────────┐
│ (Expression)                           │
│ ExpressionTransform                    │
│   (Sorting)                            │
│   MergingSortedTransform 16 → 1        │
│     MergeSortingTransform × 16         │
│       LimitsCheckingTransform × 16     │
│         PartialSortingTransform × 16   │
│           (Expression)                 │
│           ExpressionTransform × 16     │
│             (ReadFromMergeTree)        │
│             MergeTreeThread × 16 0 → 1 │
└────────────────────────────────────────┘
```
{
            if (expressions.prewhere_info->row_level_filter)
            {
                auto row_level_filter_step = std::make_unique<FilterStep>(
                    query_plan.getCurrentDataStream(),
                    expressions.prewhere_info->row_level_filter,
                    expressions.prewhere_info->row_level_column_name,
                    true);
                row_level_filter_step->setStepDescription("Row-level security filter (PREWHERE)");
                query_plan.addStep(std::move(row_level_filter_step));
            }
            auto prewhere_step = std::make_unique<FilterStep>(
                query_plan.getCurrentDataStream(),
                expressions.prewhere_info->prewhere_actions,
                expressions.prewhere_info->prewhere_column_name,
                expressions.prewhere_info->remove_prewhere_column);
            prewhere_step->setStepDescription("PREWHERE");
            query_plan.addStep(std::move(prewhere_step));
        }
    }
    else
    {
        if (prepared_pipe)
        {
            auto prepared_source_step = std::make_unique<ReadFromPreparedSource>(std::move(*prepared_pipe));
            query_plan.addStep(std::move(prepared_source_step));
            query_plan.addInterpreterContext(context);
        }
        if (from_stage == QueryProcessingStage::WithMergeableState &&
            options.to_stage == QueryProcessingStage::WithMergeableState)