Automatic merge from submit-queue (batch tested with PRs 64318, 64269, 64438, 64516, 64311). 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>.

Revert "Change default min-startup-pods value"

This reverts commit de0bf05f.

The number of pods to require is a cluster-dependent setting, and should be set by the invoker, not defaulted here

https://github.com/kubernetes/test-infra/pull/8135 must be merged first

```release-note
NONE
```