Try to get the Django ORM lookup override working

[suejung-sentry]

With regard to the PR here, it'd be nice if we could get the ILIKE override in the Django ORM working, like that here.

An attempt was made with this PR deployed to staging, but there still appears to be something missing, as the resulting query looked like below.

FetchRepoBranchesInteractor with ilike SELECT "branches"."branch", "branches"."repoid", "branches"."authors", "branches"."head", "branches"."base", "branches"."updatestamp" FROM "branches" WHERE ("branches"."repoid" = 1262 AND UPPER("branches"."branch"::text) LIKE UPPER(%asdf%))

In that attempt I could not find the CONNECTION.VENDOR log.