Ensure ExtensionBuilder respects the proxy settings (#14899)

Release Notes:

- N/A

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

crates/extension_cli/src/main.rs

@@ -13,6 +13,7 @@ use extension::{
     extension_builder::{CompileExtensionOptions, ExtensionBuilder},
     ExtensionManifest,
 };
+use http::HttpClientWithProxy;
 use language::LanguageConfig;
 use theme::ThemeRegistry;
 use tree_sitter::{Language, Query, WasmStore};
@@ -58,7 +59,9 @@ async fn main() -> Result<()> {
     let mut manifest = ExtensionManifest::load(fs.clone(), &extension_path).await?;
 
     log::info!("compiling extension");
-    let builder = ExtensionBuilder::new(scratch_dir);
+
+    let http_client = Arc::new(HttpClientWithProxy::new(None));
+    let builder = ExtensionBuilder::new(http_client, scratch_dir);
     builder
         .compile_extension(
             &extension_path,