Unexpected server incoming requests queue after Node.js 20 version (possible performance regression)

### Version v22.14.0 ### Platform ```text Darwin macbook-JPF9H46PN7 23.5.0 Darwin Kernel Version 23.5.0: Wed May 1 20:12:58 PDT 2024; root:xnu-10063.121.3~5/RELEASE_ARM64_T6000 arm64 ``` ### Subsystem http ### What steps will reproduce the bug? Repository with reproduction - https://github.com/SuperOleg39/node-js-perf-problem-reproduction About repo: `server.js` - a http server with: - `/`, `/test/` and `/unknown/` endpoinds with cpu-heavy work emulation - 5 parallel request processing limit for this endpoints for event loop overload protection - `/readyz` health check endpoint - `/metrics` metrics endpoint - `/`, `/test/` and `/unknown/` handlers wrapped in `setImmediate` to split heavy tasks by different event loop tasks `server.test.js` - performance test case for this server: - `autocannon` make a 1000 concurrent requests for 1 minute to server endpoints `/`, `/test/` and `/unknown/` - in parallel run 5 seconds interval with request to `/readyz` For reproduction, need to run `server.js` with different node.js versions, and run `server.test.js` for every try (more in repository README.md) ### How often does it reproduce? Is there a required condition? It works correctly at 16, 18 and 19 Node.js versions, but not works at 20 and 22 versions. ### What is the expected behavior? Why is that the expected behavior? Event loop lag is small, incoming health check requests is processed fast, <500ms ### What do you see instead? Event loop lag is small, but incoming health check requests is processed slowly, >10s ### Additional information Hello! We have a integration test for custom requests limiter, working on the principle of awesome [under-pressure](https://github.com/fastify/under-pressure) library - in summary with this requests limiter Node.js application can be responsive even under high load. This test emulates a high load and endpoints with CPU-heavy work, and expects that fast requests to health checks or metrics will be processed almost immediately. After updat…