refactor: consolidate async timing helpers (#99721)

scripts/run-node.mjs

@@ -21,6 +21,7 @@ import {
   writeBuildStamp as writeDistBuildStamp,
   writeRuntimePostBuildStamp as writeDistRuntimePostBuildStamp,
 } from "./lib/local-build-metadata.mjs";
+import { sleep } from "./lib/sleep.mjs";
 import {
   discoverStaticExtensionAssets,
   listStaticExtensionAssetSources,
@@ -686,11 +687,6 @@ const parsePositiveIntegerEnv = (env, name, fallback) => {
   return Number.isInteger(parsed) && parsed > 0 ? parsed : fallback;
 };
 
-const sleep = (ms) =>
-  new Promise((resolve) => {
-    setTimeout(resolve, ms);
-  });
-
 const resolveRunNodeOutputLogPath = (deps) => {
   const outputLog = deps.env[RUN_NODE_OUTPUT_LOG_ENV]?.trim();
   if (!outputLog) {