After putting a couple of days into this, I'm blocking this on 728777 because without it I think we'll be adding to an already large heap of tech debt.

The goal is to replace what Findit had to do (https://codesearch.chromium.org/chromium/infra/appengine/findit/services/bigquery_helper.py) by making infra_libs.bigquery available via Vpython. Because infra_libs is already available via Vpython, the work that is left is simply to fix 728777 and update the documentation (infra/doc/users/event_pipeline.md) to point Python GAE app owners who wish to use the Event Pipeline.

infra_libs.bigquery is being used in buildbucket which is an appengine app.
buildbucket doesn't use its create_rows function, but that's not the important part.