chore(server): move server tests folder (#9614)

packages/backend/server/tsconfig.json

@@ -13,6 +13,7 @@
   "references": [
     { "path": "../../../tests/kit" },
     { "path": "../../../tools/cli" },
+    { "path": "../../../tools/utils" },
     { "path": "../native" }
   ]
 }