Please provide a way to get Vulkan queue family index for custom renderer in QQuickItem subclasses

Setup:

QQuickWindow::setGraphicsApi(QSGRendererInterface::Vulkan);

Scene graph backend is RHI.

Vulkan queue family index is often required in custom renderers, that uses QQuickItem created on QQuickWindow as a surface to draw. If one not provides custom VkInstance via QVulkanInstance and VkPhysicalDevice, VkDevice, queueFamilyIndex, queueIndex via QQuickGraphicsDevice, then it is impossible to get queueFamilyIndex and queueIndex via available API: QSGRendererInterface.getResource can't get (pointers to) that values, because it is unimplemented (there is even no suitable QSGRendererInterface::Resource:: enum value). As I can see QRhiVulkanNativeHanles contains all of them, but there is no public API to get.

Example of where queue family index is required: VkImageCreateInfo in image sharing mode requires pQueueFamilyIndices to be specified.