Automatic merge from submit-queue (batch tested with PRs 54635, 54250, 54657, 54696, 54700). 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>.

Add openssh-client back into the debian-hyperkube-base image

**What this PR does / why we need it**: adds `openssh-client` back into the `debian-hyperkube-base` image. This was removed in #48365, but is apparently needed by the gitRepo volume plugin.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #54129

**Special notes for your reviewer**:
I haven't yet pushed this image, so builds will fail. If this looks good, I'll push and re-trigger tests.

**Release note**:

```release-note
Add openssh-client back into the hyperkube image. This allows the gitRepo volume plugin to work properly.
```

/assign @luxas @tallclair