Automatic merge from submit-queue (batch tested with PRs 50775, 51397, 51168, 51465, 51536)
Enable batch/v1beta1.CronJobs by default
This PR moves to CronJobs beta entirely, enabling `batch/v1beta1` by default.
Related issue: #41039
@erictune @janetkuo ptal
```release-note
Promote CronJobs to batch/v1beta1.
```