Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Fix cluster autoscaler test to support regional clusters. **What this PR does / why we need it**: Fixes cluster autoscaler e2e tests to work with regional clusters. **Release note**: ```NONE```