Cannot use `DISTINCT` with ARRAY_AGG

The `array_agg` function does allow the use of `DISTINCT` but this throws a parse error:

```sql
ARRAY_AGG(DISTINCT m.name ORDER BY m.name ASC)
```

```
[Syntax Error] line 0, col 198: Error: Expected StateFieldPathExpression | string | InputParameter | FunctionsReturningStrings | AggregateExpression, got 'DISTINCT'
```