test: ignore coverage on data-center package

It will be removed soon.

package.json

@@ -38,6 +38,7 @@
   },
   "devDependencies": {
     "@affine/cli": "workspace:*",
+    "@istanbuljs/schema": "^0.1.3",
     "@perfsee/sdk": "^1.5.1",
     "@playwright/test": "^1.31.2",
     "@testing-library/react": "^14.0.0",