src: add HandleScope to fix error

Add `HandleError`s to the AsyncScope constructor and destructor in
async_wrap-inl.h to fix "FATAL ERROR" incurring observed while running
test-http2-respond-with-file using the --trace-events-enabled flag.

Fixes: #19921

PR-URL: #19972
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/async_wrap-inl.h

@@ -50,13 +50,15 @@ inline AsyncWrap::AsyncScope::AsyncScope(AsyncWrap* wrap)
   Environment* env = wrap->env();
   if (env->async_hooks()->fields()[Environment::AsyncHooks::kBefore] == 0)
     return;
+  v8::HandleScope handle_scope(env->isolate());
   EmitBefore(env, wrap->get_async_id());
 }
 
 inline AsyncWrap::AsyncScope::~AsyncScope() {
   Environment* env = wrap_->env();
   if (env->async_hooks()->fields()[Environment::AsyncHooks::kAfter] == 0)
     return;
+  v8::HandleScope handle_scope(env->isolate());
   EmitAfter(env, wrap_->get_async_id());
 }