992 bug parsons bigquery upsert is broken (#994)

* add template table to all copy functions, refactor schema generation, clean up error handling

* fix tests and param renames

* fix upsert query

* formatting

* black fix

* fix fn signature

* Add job config kwargs to copy

* template table optional

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Co-authored-by: Kasia Hinkson <52927664+KasiaHinkson@users.noreply.github.com>