**Describe the bug**

"Not found column ... in block" error, when join on alias column.

**How to reproduce**

```sql
CREATE TABLE a (
    id UInt32,
    value UInt32,
    id_alias UInt32 ALIAS id    
) ENGINE = MergeTree() ORDER BY id;

CREATE TABLE b (
    id UInt32,
    value UInt32
) ENGINE = MergeTree() ORDER BY id;

INSERT INTO a VALUES (1, 1), (2, 2), (3, 3);
INSERT INTO b VALUES (1, 4), (2, 5), (3, 6);

SELECT * FROM a JOIN b ON a.id_alias = b.id;
```

**Expected behavior**

In version 21.5.9.4 result is:

id | value | b.id | b.value
-- | -------- | ----- | ----------
1 |  1 | 1 | 4 
2 | 2 | 2 | 5 
3 | 3 | 3 | 6 

**Error message and/or stacktrace**

In version 21.7.5.29 result is:
```
SQL Error [10]: ClickHouse exception, code: 10, host: 127.0.0.1, port: 14343; Code: 10, e.displayText() = DB::Exception: Not found column id_alias in block. There are only columns: id, value (version 21.7.5.29 (official build))
```
{
                    optimize_trivial_count = false;
                    break;
                }
            }
        }
    }
    NameSet unknown_required_source_columns = required;
    for (NamesAndTypesList::iterator it = source_columns.begin(); it != source_columns.end();)
    {
        const String & column_name = it->name;
        unknown_required_source_columns.erase(column_name);
        if (!required.count(column_name))
            source_columns.erase(it++);
        else
            ++it;
    }
    
    
    if (storage)
    {
        const auto storage_virtuals = storage->getVirtuals();
        for (auto it = unknown_required_source_columns.begin(); it != unknown_required_source_columns.end();)
        {
            auto column = storage_virtuals.tryGetByName(*it);
            if (column)
            {
                source_columns.push_back(*column);
                unknown_required_source_columns.erase(it++);
            }