Transition texture layout to eGeneral after creation

As we no longer set the layout to general inside the Texture constructor, yet, we need it to be set prior to the image being used as an attachment. We need to transition the layout to `eGeneral` after creation of the texture object.

app/src/main/cpp/skyline/gpu/texture_manager.cpp

@@ -69,6 +69,7 @@ namespace skyline::gpu {
 
         // Create a texture as we cannot find one that matches
         auto texture{std::make_shared<Texture>(gpu, guestTexture)};
+        texture->TransitionLayout(vk::ImageLayout::eGeneral);
         auto it{texture->guest->mappings.begin()};
         textures.emplace(mappingEnd, TextureMapping{texture, it, guestMapping});
         while ((++it) != texture->guest->mappings.end()) {