[Vulkan] Optional functionality usage improvements

Functional changes:
- Enable only actually used features, as drivers may take more optimal
  paths when certain features are disabled.
- Support VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE.
- Fix the separateStencilMaskRef check doing the opposite.
- Support shaderRoundingModeRTEFloat32.
- Fix vkGetDeviceBufferMemoryRequirements pointer not passed to the Vulkan
  Memory Allocator.

Stylistic changes:
- Move all device extensions, properties and features to one structure,
  especially simplifying portability subset feature checks, and also making
  it easier to request new extension functionality in the future.
- Remove extension suffixes from usage of promoted extensions.

src/xenia/gpu/vulkan/vulkan_primitive_processor.cc

@@ -27,18 +27,12 @@ namespace vulkan {
 VulkanPrimitiveProcessor::~VulkanPrimitiveProcessor() { Shutdown(true); }
 
 bool VulkanPrimitiveProcessor::Initialize() {
-  const ui::vulkan::VulkanProvider& provider =
-      command_processor_.GetVulkanProvider();
-  const VkPhysicalDeviceFeatures& device_features = provider.device_features();
-  const VkPhysicalDevicePortabilitySubsetFeaturesKHR*
-      device_portability_subset_features =
-          provider.device_portability_subset_features();
-  if (!InitializeCommon(device_features.fullDrawIndexUint32,
-                        !device_portability_subset_features ||
-                            device_portability_subset_features->triangleFans,
-                        false, device_features.geometryShader,
-                        device_features.geometryShader,
-                        device_features.geometryShader)) {
+  const ui::vulkan::VulkanProvider::DeviceInfo& device_info =
+      command_processor_.GetVulkanProvider().device_info();
+  if (!InitializeCommon(device_info.fullDrawIndexUint32,
+                        device_info.triangleFans, false,
+                        device_info.geometryShader, device_info.geometryShader,
+                        device_info.geometryShader)) {
     Shutdown();
     return false;
   }