[CI] Add autoscaling annotations to windows containers

This patch also applies the autoscaling annotations that disableGKE's autoscaling
from downscaling with nodes that currently have jobs scheduled on them to the
windows runners too.

premerge/windows_runner_values.yaml

@@ -5,6 +5,9 @@ minRunners: 0
 maxRunners: 2
 
 template:
+  metadata:
+    annotations:
+      cluster-autoscaler.kubernetes.io/safe-to-evict: "false"
   spec:
     tolerations:
     - key: "node.kubernetes.io/os"