test(snap): capture full vp build output for NTFS junction repro

Drop the grep filter so the Windows CI snap diff shows the complete
[plugin vite:build-html] failure from issue #1374.

Author: fengmk2

packages/cli/snap-tests/build-ntfs-junction/snap.txt

@@ -1,2 +1,2 @@
-> cd via/app && vp build 2>&1 | grep -E 'built in|vite:build-html'
-✓ built in <variable>ms
+> node setup.js
+> cd via/app && vp build 2>&1

packages/cli/snap-tests/build-ntfs-junction/steps.json

@@ -2,6 +2,6 @@
   "ignoredPlatforms": ["darwin", "linux"],
   "commands": [
     { "command": "node setup.js", "ignoreOutput": true },
-    "cd via/app && vp build 2>&1 | grep -E 'built in|vite:build-html'"
+    "cd via/app && vp build 2>&1"
   ]
 }