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 │
└────────────────────────────────────────┘
```
{
                QueryPlanStepPtr before_join_step = std::make_unique<ExpressionStep>(
                    query_plan.getCurrentDataStream(),
                    expressions.before_join);
                before_join_step->setStepDescription("Before JOIN");
                query_plan.addStep(std::move(before_join_step));
            }
            
            if (expressions.converting_join_columns)
            {
                QueryPlanStepPtr convert_join_step = std::make_unique<ExpressionStep>(
                    query_plan.getCurrentDataStream(),
                    expressions.converting_join_columns);
                convert_join_step->setStepDescription("Convert JOIN columns");
                query_plan.addStep(std::move(convert_join_step));
            }
            if (expressions.hasJoin())
            {
                if (expressions.join->isFilled())
                {
                    QueryPlanStepPtr filled_join_step = std::make_unique<FilledJoinStep>(
                        query_plan.getCurrentDataStream(),
                        expressions.join,
                        settings.max_block_size);
                    filled_join_step->setStepDescription("JOIN");
                    query_plan.addStep(std::move(filled_join_step));
                }
                else
                {
                    auto joined_plan = query_analyzer->getJoinedPlan();