devel/rubygem-google-apis-bigquery_v2: Add rubygem-google-apis-bigquery_v2 0.51.0

This is a simple client library for version V2 of the BigQuery API. It provides:
- A client object that connects to the HTTP/JSON REST endpoint for the service.
- Ruby objects for data structures related to the service.
- Integration with the googleauth gem for authentication using OAuth, API keys,
  and service accounts.
- Control of retry, pagination, and timeouts.