(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

{
    size_t next_step_i = 0;
    if (hasPrewhere())
    {
        const ExpressionActionsChain::Step & step = *chain.steps.at(next_step_i++);
        prewhere_info->prewhere_actions->projectInput(false);
        NameSet columns_to_remove;
        for (const auto & [name, can_remove] : step.required_output)
        {
            if (name == prewhere_info->prewhere_column_name)
                prewhere_info->remove_prewhere_column = can_remove;
            else if (can_remove)
                columns_to_remove.insert(name);
        }
        columns_to_remove_after_prewhere = std::move(columns_to_remove);
    }
    if (hasWhere())
    {
        auto where_column_name = query.where()->getColumnName();
        remove_where_filter = chain.steps.at(where_step_num)->required_output.find(where_column_name)->second;
    }
}
void ExpressionAnalysisResult::removeExtraColumns() const
{
    if (hasWhere())
        before_where->projectInput();
    if (hasHaving())
        before_having->projectInput();
}
void ExpressionAnalysisResult::checkActions() const