fix(http): ensure body resources are released on stream cancellation (#3228)

Co-authored-by: Amr Bashir <github@amrbashir.me>

Author: idootop

.changes/fix-http-stream-cancellation.md

@@ -0,0 +1,6 @@
+---
+http: patch
+http-js: patch
+---
+
+Cleanup resource when the returned `ReadableStream.cancel` is called to avoid memory leaks

plugins/http/api-iife.js

@@ -275,7 +275,11 @@ export async function fetch(
             void dropBody()
           })
         },
-        pull: (controller) => readChunk(controller)
+        pull: (controller) => readChunk(controller),
+        cancel: () => {
+          // Ensure body resources are released on stream cancellation
+          void dropBody()
+        }
       })
 
   const res = new Response(body, {