Limit bigquery.py exponential backoff to 60s

[damccorm]

Seen here: https://issues.apache.org/jira/browse/BEAM-8842?focusedCommentId=16983995&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16983995
retry delays grow quickly into the 1000s range.

cc [~chamikara]

Imported from Jira BEAM-8843. Original Jira may contain additional context.
Reported by: udim.