Surface write

[kvark]

Connections
Fixes #2383

Description
We didn't handle write_texture properly for surface stuff.

Testing
Used the following modification in hello-triangle:

diff --git a/wgpu/examples/hello-triangle/main.rs b/wgpu/examples/hello-triangle/main.rs
index 885ca201..26b6dc80 100644
--- a/wgpu/examples/hello-triangle/main.rs
+++ b/wgpu/examples/hello-triangle/main.rs
@@ -68,7 +68,7 @@ async fn run(event_loop: EventLoop<()>, window: Window) {
     });
 
     let mut config = wgpu::SurfaceConfiguration {
-        usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
+        usage: wgpu::TextureUsages::RENDER_ATTACHMENT | wgpu::TextureUsages::COPY_DST,
         format: swapchain_format,
         width: size.width,
         height: size.height,
@@ -98,6 +98,7 @@ async fn run(event_loop: EventLoop<()>, window: Window) {
                 let frame = surface
                     .get_current_texture()
                     .expect("Failed to acquire next swap chain texture");
+
                 let view = frame
                     .texture
                     .create_view(&wgpu::TextureViewDescriptor::default());
@@ -110,7 +111,7 @@ async fn run(event_loop: EventLoop<()>, window: Window) {
                             view: &view,
                             resolve_target: None,
                             ops: wgpu::Operations {
-                                load: wgpu::LoadOp::Clear(wgpu::Color::GREEN),
+                                load: wgpu::LoadOp::Load,
                                 store: true,
                             },
                         }],
@@ -120,6 +121,22 @@ async fn run(event_loop: EventLoop<()>, window: Window) {
                     rpass.draw(0..3, 0..1);
                 }
 
+                let data = vec![0xFF; (1024 * config.height * 4) as usize];
+                queue.write_texture(
+                    frame.texture.as_image_copy(),
+                    &data,
+                    wgpu::ImageDataLayout {
+                        offset: 0,
+                        bytes_per_row: std::num::NonZeroU32::new(config.width * 4),
+                        rows_per_image: None,
+                    },
+                    wgpu::Extent3d {
+                        width: config.width,
+                        height: config.height,
+                        depth_or_array_layers: 1,
+                    },
+                );
+
                 queue.submit(Some(encoder.finish()));
                 frame.present();
             }

[cwfitzgerald]

LGTM

[kvark]

Thanks for the quick review!
I think this is a bit of a risky change, we should keep an eye for issues.