Address review comment. Pass the device_impl shared_ptr reference

directly, instead of creating the device object instance.

Author: slawekptak

sycl/source/detail/graph_impl.hpp

@@ -919,6 +919,10 @@ class graph_impl : public std::enable_shared_from_this<graph_impl> {
   /// @return Device associated with graph.
   sycl::device getDevice() const { return MDevice; }
 
+  const DeviceImplPtr &getDeviceImplPtr() const {
+    return getSyclObjImpl(MDevice);
+  }
+
   /// List of root nodes.
   std::set<std::weak_ptr<node_impl>, std::owner_less<std::weak_ptr<node_impl>>>
       MRoots;

sycl/source/handler.cpp

@@ -2012,8 +2012,8 @@ void handler::setUserFacingNodeType(ext::oneapi::experimental::node_type Type) {
 }
 
 std::optional<std::array<size_t, 3>> handler::getMaxWorkGroups() {
-  device Device = detail::getDeviceFromHandler(*this);
-  const auto &DeviceImpl = detail::getSyclObjImpl(Device);
+  const auto &DeviceImpl =
+      MQueue ? MQueue->getDeviceImplPtr() : impl->MGraph->getDeviceImplPtr();
   std::array<size_t, 3> UrResult = {};
   auto Ret = DeviceImpl->getAdapter()->call_nocheck<UrApiKind::urDeviceGetInfo>(
       DeviceImpl->getHandleRef(),