Investigate possibility to support multiple types of writers

[dgray16]

• Load Job - Implemented
• Write API - TO BE REVIEWED - https://cloud.google.com/bigquery/docs/write-api
• Streaming - TO BE REVIEWED - https://cloud.google.com/bigquery/streaming-data-into-bigquery
• JDBC / ODBC Driver - TO BE REVIEWED - https://cloud.google.com/bigquery/docs/reference/odbc-jdbc-drivers