Source Google Ads should natively support the campaign_performance_report stream

## Tell us about the problem you’re trying to solve
Our GAds source does not currently support the campaign_performance_report stream.

## Describe the alternative you’ve considered or used
A workaround does exist, in that users can write a custom query to pull these reports. However, this is quite a bit more tedious, since they would need to manually enter all the field names in the report. Supporting the report streams natively would streamline the experience.

## Additional context
Fivetran’s GAds integration supports this stream.