renderer init: create a detached task only on wasm, block otherwise (#9830)

# Objective

- When initializing the renderer, Bevy currently create a detached task
- This is needed on wasm but not on native


## Solution

- Don't create a detached task on native but block on the future

crates/bevy_render/src/lib.rs

@@ -251,8 +251,7 @@ impl Plugin for RenderPlugin {
             let primary_window = system_state.get(&app.world).get_single().ok().cloned();
 
             let settings = self.wgpu_settings.clone();
-            bevy_tasks::IoTaskPool::get()
-                .spawn_local(async move {
+            let async_renderer = async move {
                 let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
                     backends,
                     dx12_shader_compiler: settings.dx12_shader_compiler.clone(),
@@ -272,11 +271,7 @@ impl Plugin for RenderPlugin {
                 };
 
                 let (device, queue, adapter_info, render_adapter) =
-                        renderer::initialize_renderer(
-                            &instance,
-                            &settings,
-                            &request_adapter_options,
-                        )
+                    renderer::initialize_renderer(&instance, &settings, &request_adapter_options)
                         .await;
                 debug!("Configured wgpu adapter Limits: {:#?}", device.limits());
                 debug!("Configured wgpu adapter Features: {:#?}", device.features());
@@ -284,8 +279,15 @@ impl Plugin for RenderPlugin {
                     future_renderer_resources_wrapper.lock().unwrap();
                 *future_renderer_resources_inner =
                     Some((device, queue, adapter_info, render_adapter, instance));
-                })
+            };
+            // In wasm, spawn a task and detach it for execution
+            #[cfg(target_arch = "wasm32")]
+            bevy_tasks::IoTaskPool::get()
+                .spawn_local(async_renderer)
                 .detach();
+            // Otherwise, just block for it to complete
+            #[cfg(not(target_arch = "wasm32"))]
+            futures_lite::future::block_on(async_renderer);
 
             app.init_resource::<ScratchMainWorld>();