feat(KONFLUX-3796): Test arm64 multi-arch builds with max number of VMs (#4144)

Author: jhutar

components/multi-platform-controller/staging/host-config.yaml

@@ -19,7 +19,7 @@ data:
   dynamic.linux-arm64.aws-secret: aws-account
   dynamic.linux-arm64.ssh-secret: aws-ssh-key
   dynamic.linux-arm64.security-group-id: sg-05bc8dd0b52158567
-  dynamic.linux-arm64.max-instances: "10"
+  dynamic.linux-arm64.max-instances: "160"
   dynamic.linux-arm64.subnet-id: subnet-030738beb81d3863a
 
   dynamic.linux-mxlarge-arm64.type: aws