Hetzner autoscaler can`t provision windows and linux nodes in one cluster

[xrow]

Which component are you using?:

hetzner

Which component hosted in this repository is this a feature for?

hetzer

Is your feature request designed to solve a problem? If so describe the problem this feature should solve.:

There is a cluster-config.json needed. By design you can`t add windows nodes, because the image key is a ancester and not a child from the pool key. So you can only pick one image.

Describe the solution you'd like.:

Move the key image into the pool

Describe any alternative solutions you've considered.:

none

Additional context.:

[adrianmoisey]

/area cluster-autoscaler