(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

aggregate.parameters = (node->parameters) ? getAggregateFunctionParametersArray(node->parameters) : Array();
        aggregate.function = AggregateFunctionFactory::instance().get(node->name, types, aggregate.parameters, properties);
        aggregate_descriptions.push_back(aggregate);
    }
    return !aggregates().empty();
}
void makeWindowDescriptionFromAST(WindowDescription & desc, const IAST * ast)
{
    const auto & definition = ast->as<const ASTWindowDefinition &>();
    if (definition.partition_by)
    {
        for (const auto & column_ast : definition.partition_by->children)
        {
            const auto * with_alias = dynamic_cast<const ASTWithAlias *>(
                column_ast.get());
            if (!with_alias)
            {
                throw Exception(ErrorCodes::BAD_ARGUMENTS,
                    "Expected a column in PARTITION BY in window definition,"
                    " got '{}'",
                    column_ast->formatForErrorMessage());
            }
            desc.partition_by.push_back(SortColumnDescription(
                    with_alias->getColumnName(), 1 ,
                    1 ));
        }
    }
    if (definition.order_by)
    {
        for (const auto & column_ast