Idle cpu consumption

## Expected Behavior

Actix doesn't consume cpu while idle.

## Current Behavior

Actix constantly consumes 0.1% cpu while idle.

## Steps to Reproduce (for bugs)

Start hello world actix server.

## Context

I have tested other web frameworks: axum, ntex. They don't consume any cpu while idle as expected.

## Your Environment

- Rust Version (I.e, output of `rustc -V`): 1.79
- Actix Web Version: 4.8.0