Automatic merge from submit-queue
Added an end-to-end test ensuring that Cluster Autoscaler does not scale up when all pending pods are unschedulable
**What this PR does / why we need it**:
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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