Add Device::CreateQueue() instead of the builder

We are changing all object creation to use descriptors but there is no
creation argument to pass for queue, so instead Device::CreateQueue
takes no argument.

examples/glTFViewer/glTFViewer.cpp

@@ -458,7 +458,7 @@ namespace {
     void init() {
         device = CreateCppNXTDevice();
 
-        queue = device.CreateQueueBuilder().GetResult();
+        queue = device.CreateQueue();
         swapchain = GetSwapChain(device);
         swapchain.Configure(GetPreferredSwapChainTextureFormat(),
                             nxt::TextureUsageBit::OutputAttachment, 640, 480);