Automatic merge from submit-queue (batch tested with PRs 48997, 48595, 48898, 48711, 48972)

hpa: Prevent scaling below MinReplicas if desiredReplicas is zero

**What this PR does / why we need it**:
Prevent a HPA scaling below `minReplicas` if `desiredReplicas` is calculated as `0`.

Example events of a HPA continuously scaling between `1` and `MinReplicas`:
```
2h        59s        22    horizontal-pod-autoscaler            Normal        SuccessfulRescale    New size: 1; reason: All metrics below target
2h        29s        22    horizontal-pod-autoscaler            Normal        SuccessfulRescale    New size: 15; reason: Current number of replicas below Spec.MinReplicas
```

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #49028

**Special notes for your reviewer**:

**Release note**:

```release-note
hpa: Prevent scaling below MinReplicas if desiredReplicas is zero
```