(you don't have to strictly follow this form)

**Describe the bug**
When using `ORDER BY column_name COLLATE 'en'`, `COLLATE` is ignored if `column_name` is the primary key
 
**How to reproduce**
* version 21.1.2
* `CREATE TABLE` statements for all tables involved:
```
CREATE TABLE test.test_collation
(
    `v` String,
    `v2` String
)
ENGINE = MergeTree
ORDER BY v
SETTINGS index_granularity = 8192
```
* Sample data:
```
insert into test.test_collation values ('A', 'A')
insert into test.test_collation values ('B', 'B')
insert into test.test_collation values ('C', 'C')
insert into test.test_collation values ('a', 'a')
insert into test.test_collation values ('b', 'b')
insert into test.test_collation values ('c', 'c')
```
* Queries to run that lead to unexpected result
Primary key
```
SELECT *
FROM test.test_collation
ORDER BY v ASC COLLATE 'en'

Query id: fa84ae7a-abe7-4886-99cd-eba7ad5d5fc4

┌─v─┬─v2─┐
│ A │ A  │
│ B │ B  │
│ C │ C  │
│ a │ a  │
│ b │ b  │
│ c │ c  │
└───┴────┘
```
Separate column
```
SELECT *
FROM test.test_collation
ORDER BY v2 ASC COLLATE 'en'

Query id: 04401f85-3cb2-442c-8c89-e3328d1615cd

┌─v─┬─v2─┐
│ a │ a  │
│ A │ A  │
│ b │ b  │
│ B │ B  │
│ c │ c  │
│ C │ C  │
└───┴────┘
```

**Expected behavior**
Both of these queries to return the rows in the same order

}
        };
        const auto & actions = elements_actions[i]->getActions();
        bool ok;
        
        
        
        
        if (context->getSettingsRef().optimize_respect_aliases && aliase_columns.contains(required_sort_description[i].column_name))
        {
            auto column_expr = metadata_snapshot->getColumns().get(required_sort_description[i].column_name).default_desc.expression->clone();
            replaceAliasColumnsInQuery(column_expr, metadata_snapshot->getColumns(), forbidden_columns, context);
            auto syntax_analyzer_result = TreeRewriter(context).analyze(column_expr, metadata_snapshot->getColumns().getAll());
            const auto expression_analyzer = ExpressionAnalyzer(column_expr, syntax_analyzer_result, context).getActions(true);
            const auto & alias_actions = expression_analyzer->getActions();
            ok = apply_order_judge(alias_actions, column_expr->getColumnName());
        }
        else
            ok = apply_order_judge(actions, required_sort_description[i].column_name);
        if (ok)
            order_key_prefix_descr.push_back(required_sort_description[i]);
        else
            break;
    }
    if (order_key_prefix_descr.empty())
        return {};
    return std::make_shared<InputOrderInfo>(std::move(order_key_prefix_descr), read_direction);
}
}