Merge commit 'f2fabfdf0' into canary_experimental

Sync changes from master up to before the recent GPU changes, those will be
merged later

src/xenia/gpu/vulkan/vulkan_texture_cache.h

@@ -180,7 +180,6 @@ class VulkanTextureCache final : public TextureCache {
   enum LoadDescriptorSetIndex {
     kLoadDescriptorSetIndexDestination,
     kLoadDescriptorSetIndexSource,
-    kLoadDescriptorSetIndexConstants,
     kLoadDescriptorSetCount,
   };