Upgrade Smithay to pinned upstream Git

Pin 8a270232f1bfc416c781273c98a3f52a812a0bba and adapt protocol dispatch, input timestamps, configure state and rendering APIs. Preserve custom lock and toplevel validation, compositor-owned key repeats, and valid layer remapping sequences.

Add native icon-buffer lifecycle regressions for the GoLand and Spotify launch failure.

compositor/src/render/scene.rs

@@ -351,7 +351,13 @@ fn scene_elements(
                 elements.push(shadow.into());
             }
         } else {
-            elements.extend(constrain_space_element::<GlesRenderer, _, AnimatedWindowRenderElement>(
+            elements.extend(constrain_space_element::<
+                GlesRenderer,
+                _,
+                AnimatedWindowRenderElement,
+                _,
+                _,
+            >(
                 renderer,
                 &window,
                 constrain.loc,