We discovered there may be some kind of a problem with the stale tests for this job, the problem can most easily be seen with:

```html
❯ curl https://testgrid.k8s.io/sig-release-master-blocking/table\?show-stale-tests\=\&tab\=ci-kubernetes-unit

500 Server Error

Error: Server Error

The server encountered an error and could not complete your request.

Please try again in 30 seconds.

```

And the UI also shows a problem loading: https://testgrid.k8s.io/sig-release-master-blocking#ci-kubernetes-unit&show-stale-tests=
Which reports "Internal Error: Refresh, and file an issue if problem persists. (Your table may be too big; consider lower `days_of_results` or `enable_test_methods = false`)" I am unable to find a way to set these recommended values, tried query params with both _ and -.

The normal view of the job loads ok (although slowly): https://testgrid.k8s.io/sig-release-master-blocking#ci-kubernetes-unit

According to it there are 14,000 stale tests.