WIP: feat(dx12): enable GPU-based validation for DX12 backend

Logic for doing this was sourced from
<https://learn.microsoft.com/en-us/windows/win32/direct3d12/using-d3d12-debug-layer-gpu-based-validation>.

d3d12/src/debug.rs

@@ -1,7 +1,10 @@
 use crate::com::ComPtr;
-use winapi::um::d3d12sdklayers;
 #[cfg(any(feature = "libloading", feature = "implicit-link"))]
 use winapi::Interface as _;
+use winapi::{
+    shared::{minwindef::TRUE, winerror::S_OK},
+    um::d3d12sdklayers,
+};
 
 pub type Debug = ComPtr<d3d12sdklayers::ID3D12Debug>;
 
@@ -40,4 +43,14 @@ impl Debug {
     pub fn enable_layer(&self) {
         unsafe { self.EnableDebugLayer() }
     }
+
+    pub fn enable_gpu_based_validation(&self) -> bool {
+        let (ptr, hr) = unsafe { self.cast::<d3d12sdklayers::ID3D12Debug1>() };
+        if hr == S_OK {
+            unsafe { ptr.SetEnableGPUBasedValidation(TRUE) };
+            true
+        } else {
+            false
+        }
+    }
 }

wgpu-hal/src/dx12/instance.rs

@@ -24,6 +24,7 @@ impl crate::Instance<super::Api> for super::Instance {
                 Ok(pair) => match pair.into_result() {
                     Ok(debug_controller) => {
                         debug_controller.enable_layer();
+                        debug_controller.enable_gpu_based_validation();
                     }
                     Err(err) => {
                         log::warn!("Unable to enable D3D12 debug interface: {}", err);