Extract http from util (#11680)

This avoids the CLI linking libssl etc...

Release Notes:

- N/A

crates/extension/src/extension_builder.rs

@@ -6,6 +6,7 @@ use async_compression::futures::bufread::GzipDecoder;
 use async_tar::Archive;
 use futures::io::BufReader;
 use futures::AsyncReadExt;
+use http::{self, AsyncBody, HttpClient};
 use serde::Deserialize;
 use std::{
     env, fs, mem,
@@ -13,7 +14,6 @@ use std::{
     process::{Command, Stdio},
     sync::Arc,
 };
-use util::http::{self, AsyncBody, HttpClient};
 use wasm_encoder::{ComponentSectionId, Encode as _, RawSection, Section as _};
 use wasmparser::Parser;
 use wit_component::ComponentEncoder;