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/backends/direct/transaction.rs

@@ -83,7 +83,7 @@ pub(super) fn validate_device(device: &DirectDevice, scan: &OutputScan) -> Resul
     let mut buffers = Vec::new();
     let mut framebuffers = Vec::new();
     let mut allocator = GbmAllocator::new(device.gbm.clone(), GbmBufferFlags::RENDERING | GbmBufferFlags::SCANOUT);
-    let exporter = GbmFramebufferExporter::new(device.gbm.clone(), Some(device.render_node));
+    let exporter = GbmFramebufferExporter::new(device.gbm.clone(), Some(device.render_node).into());
     let mut used_planes = HashSet::new();
     let desired_crtcs = scan
         .selections