ButtonGroup defaults are not available early enough in the render process

[ItsMeBrianD]

Using an example like this:

```sql myQuery
SELECT table."${inputs.button_group_value}" FROM table
```
<ButtonGroup name="button_group_value">
    <ButtonGroupItem value="whatever" default />
</ButtonGroup>

The build is likely to break, because the query will initially run as table."". We either need a mechanism for escaping this behavior somehow, or to note that this is not a supported behavior.

We also need to check and see if this is happening with any other inputs, or if this is specific to ButtonGroup