[SYCL] Make device comparison method to analyze impl not native handl…

…es (#6880)

Initial issue was sycl::link failure with many devices passed when
esimd_emulator backend is enabled.
esimd_emulator does not have getNative method implemented while we
checked object equality by comparison of native handles.
It seems to be not fully valid and we need to check it using operator.
GetNative implementation for esimd_emulator is not needed.

Signed-off-by: Tikhomirova, Kseniya <kseniya.tikhomirova@intel.com>

sycl/include/sycl/device.hpp

@@ -234,8 +234,6 @@ class __SYCL_EXPORT device {
   template <class T>
   friend T detail::createSyclObjFromImpl(decltype(T::impl) ImplObj);
 
-  friend auto detail::getDeviceComparisonLambda();
-
   template <backend BackendName, class SyclObjectT>
   friend auto get_native(const SyclObjectT &Obj)
       -> backend_return_t<BackendName, SyclObjectT>;

sycl/source/kernel_bundle.cpp

@@ -116,13 +116,13 @@ bool kernel_bundle_plain::is_specialization_constant_set(
 const std::vector<device>
 removeDuplicateDevices(const std::vector<device> &Devs) {
   auto compareDevices = [](device a, device b) {
-    return getSyclObjImpl(a)->getHandleRef() <
-           getSyclObjImpl(b)->getHandleRef();
+    return getSyclObjImpl(a) < getSyclObjImpl(b);
   };
   std::set<device, decltype(compareDevices)> UniqueDeviceSet(
       Devs.begin(), Devs.end(), compareDevices);
   std::vector<device> UniqueDevices(UniqueDeviceSet.begin(),
                                     UniqueDeviceSet.end());
+
   return UniqueDevices;
 }