vulkan: Enable VULKAN_HPP_NO_EXCEPTIONS broadly. (#995)

* vulkan: Enable VULKAN_HPP_NO_EXCEPTIONS broadly.

* vulkan: Use structured bindings for result where possible.

src/imgui/renderer/imgui_core.cpp

@@ -98,7 +98,11 @@ void OnResize() {
 }
 
 void Shutdown(const vk::Device& device) {
-    device.waitIdle();
+    auto result = device.waitIdle();
+    if (result != vk::Result::eSuccess) {
+        LOG_WARNING(ImGui, "Failed to wait for Vulkan device idle on shutdown: {}",
+                    vk::to_string(result));
+    }
 
     TextureManager::StopWorker();
 

src/imgui/renderer/imgui_impl_vulkan.h

@@ -5,7 +5,6 @@
 
 #pragma once
 
-#define VULKAN_HPP_NO_EXCEPTIONS
 #include "common/types.h"
 #include "video_core/renderer_vulkan/vk_common.h"