bq_dts asset for OpenRank datasets

[ryscheng]

What is it?

https://www.notion.so/karma3labs/OpenRank-datasets-on-OSO-data-portal-113f0868b1ba8014a3dfdb6380387a0b

Here is a summary from the Karma3 folks of data on BQ. Let's replace the current gcs_asset with a bq_dts_asset. They plan on maintaining everything in BigQuery in the future https://docs.opensource.observer/docs/contribute/connect-data/bigquery/replication

We should rename the dataset to openrank for this and create a new data exchange listing.