Continuous performance tests for BigQuery read is not displayed on the dashboard

[damccorm]

Dashboard: https://apache-beam-testing.appspot.com/explore?dashboard=5687798237495296

BigQuery read in EXPORT and DIRECT_READ modes are not being displayed on the dashboard.

Imported from Jira BEAM-9871. Original Jira may contain additional context.
Reported by: kirillkozlov.