[tests] increase disk space for vms (#1097)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Chores**
- Increased the disk size for VM data images from 100GB to 200GB in
end-to-end cluster tests.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

hack/e2e-cluster.bats

@@ -87,7 +87,7 @@ EOF
   for i in 1 2 3; do
     cp nocloud-amd64.raw srv${i}/system.img
     qemu-img resize srv${i}/system.img 50G
-    qemu-img create srv${i}/data.img 100G
+    qemu-img create srv${i}/data.img 200G
   done
 }