Support `EXCLUDE` and `RENAME` in Snowflake

Hello,

Snowflake added two SQL keywords : `EXCLUDE` and `RENAME`

ex of query : 

```sql
SELECT 
    *
    EXCLUDE (col_a)
    RENAME col_b as b
FROM data
```

Link to documentation : https://docs.snowflake.com/en/sql-reference/sql/select.html

Thank you