Remove zerodisk from mcp offline image build

We don't need to extend image file and truncate it later
(it consumes extra 40 GB of jenkins slave for nothing)

Closes-bug: PROD-35231
Change-Id: Ia8b9290a936ce36be3033a98742cc6ffb34b8c0a
diff --git a/day01-image/template.json b/day01-image/template.json
index a862869..7bb8d6c 100644
--- a/day01-image/template.json
+++ b/day01-image/template.json
@@ -93,7 +93,7 @@
         "scripts/cleanup_salt.sh",
         "scripts/cleanup_day01.sh",
         "scripts/info.sh",
-        "scripts/zerodisk.sh"
+        "scripts/flush_disk.sh"
       ]
     },
     {