Automatic merge from submit-queue (batch tested with PRs 51984, 51351, 51873, 51795, 51634)
Build test targets for all server platforms
**What this PR does / why we need it**:
🤦
I really should have checked this before code freeze, but tbh forgot it in the rush. Also I thought this was the case already...
As part of https://github.com/kubernetes/features/issues/288; these binaries should be built for all server platforms indeed.
This is just a straightforward add to that list.
Can we please get this into v1.8?
There is virtually no risk involved here really...
**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
Build test targets for all server platforms
```
@ixdy @jdumars @mkumatag