Utilities: Keep wasm event loop alive

Create the wasm utility event loop with
Core::EventLoop::initialize_for_current_thread() so it follows the same
process-lifetime model as other program main loops.

Utilities/wasm.cpp

@@ -615,7 +615,7 @@ ErrorOr<int> ladybird_main(Main::Arguments arguments)
         }
 #endif
 
-        Core::EventLoop main_loop;
+        Core::EventLoop::initialize_for_current_thread();
         // First, resolve the linked modules
         Vector<NonnullRefPtr<Wasm::ModuleInstance>> linked_instances;
         Vector<NonnullRefPtr<Wasm::Module>> linked_modules;