[Test failure] Bigquery acceptance test flake - rate limit exceeded

```
1) Error:
Google::Cloud::Bigquery::Table::bigquery#test_0008_creates a table, loading the schema from a JSON string:
Google::Cloud::PermissionDeniedError: rateLimitExceeded: Exceeded rate limits: too many table update operations for this table. For more information, see https://cloud.google.com/bigquery/docs/troubleshoot-quotas
/workspace/google-cloud-bigquery/lib/google/cloud/bigquery/service.rb:572:in `rescue in execute'
/workspace/google-cloud-bigquery/lib/google/cloud/bigquery/service.rb:565:in `execute'
/workspace/google-cloud-bigquery/lib/google/cloud/bigquery/service.rb:217:in `delete_table'
/workspace/google-cloud-bigquery/lib/google/cloud/bigquery/table.rb:2813:in `delete'
/workspace/google-cloud-bigquery/acceptance/bigquery/table_test.rb:294:in `ensure in block (2 levels) in '
/workspace/google-cloud-bigquery/acceptance/bigquery/table_test.rb:294:in `block (2 levels) in '
```