fix: reset node env earlier during shutdown (#23068)

Co-authored-by: Jeremy Apthorp <nornagon@nornagon.net>

shell/browser/electron_browser_main_parts.cc

@@ -542,6 +542,7 @@ void ElectronBrowserMainParts::PostMainMessageLoopRun() {
   // Destroy node platform after all destructors_ are executed, as they may
   // invoke Node/V8 APIs inside them.
   node_debugger_->Stop();
+  node_env_.reset();
   js_env_->OnMessageLoopDestroying();
 
   fake_browser_process_->PostMainMessageLoopRun();