Revert "simplify create windows debug worker script"

This reverts commit 4160ec4dc0e4c0e950672b9516ead0dbda7208e0.

tools/gce/create_windows_debug_worker.sh

@@ -32,6 +32,17 @@ else
 fi
 
 MACHINE_TYPE=n1-standard-8
+TMP_DISK_NAME="$INSTANCE_NAME-temp-disk"
+
+gcloud compute disks create $TMP_DISK_NAME \
+    --project="$CLOUD_PROJECT" \
+    --zone "$ZONE" \
+    --image-project google.com:kokoro \
+    --image empty-100g-image \
+    --type pd-ssd
+
+echo 'Created scratch disk, waiting for it to become available.'
+sleep 15
 
 gcloud compute instances create $INSTANCE_NAME \
     --project="$CLOUD_PROJECT" \
@@ -39,6 +50,6 @@ gcloud compute instances create $INSTANCE_NAME \
     --machine-type $MACHINE_TYPE \
     --image-project google.com:kokoro \
     --image kokoro-win7build-v9-prod-debug \
-    --boot-disk-size 500 \
-    --boot-disk-type pd-ssd \
-    --tags=allow-ssh
+     --boot-disk-type pd-ssd \
+    --tags=allow-ssh \
+    --disk auto-delete=yes,boot=no,name=$TMP_DISK_NAME