add connection to Google BigQuery

[aaguirrek]

It is possible to connect to bigquery considering that simple SQL statements are made, so that it can be used for millions of database records through its python module

[sambhxv]

hi @aaguirrek I have implemented the same using google's bigquery dialect. You can check it out here: https://github.com/frappe/insights/issues/324

[nextchamp-saqib]

BigQuery connector is implemented in v3.0+