tpetra: replace use of impl_dualview_is_single_device

replace use of Kokkos impl_* routine, preemptive change in case internal
impl routines become private members

packages/tpetra/core/src/Tpetra_MultiVector_def.hpp

@@ -1795,7 +1795,7 @@ void MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>::copyAndPermute(
     // - CombineMode needs to be INSERT.
     // - The number of vectors needs to be 1, otherwise we need to
     //   reorder the received data.
-    if ((dual_view_type::impl_dualview_is_single_device::value ||
+    if ((std::is_same_v<typename dual_view_type::t_dev::device_type, typename dual_view_type::t_host::device_type> ||
          (Details::Behavior::assumeMpiIsGPUAware () && !this->need_sync_device()) ||
          (!Details::Behavior::assumeMpiIsGPUAware () && !this->need_sync_host())) &&
         areRemoteLIDsContiguous &&

packages/tpetra/core/test/ImportExport2/ImportExport2_UnitTests.cpp

@@ -730,7 +730,7 @@ namespace {
         // MV::imports_ and MV::view_ have the same memory space, the
         // imports_ view is aliased to the data view of the target MV.
         if ((myImageID == collectRank) && (myImageID == 0)) {
-          if (mv_type::dual_view_type::impl_dualview_is_single_device::value)
+          if (std::is_same_v<typename mv_type::dual_view_type::t_dev::device_type, typename mv_type::dual_view_type::t_host::device_type>)
             TEUCHOS_ASSERT(tgt_mv->importsAreAliased());
           // else {
           //   We do not know if copyAndPermute was run on host or device.
@@ -800,7 +800,7 @@ namespace {
         // MV::imports_ and MV::view_ have the same memory space, the
         // imports_ view is aliased to the data view of the target MV.
         if ((myImageID == collectRank) && (myImageID == 0)) {
-          if (mv_type::dual_view_type::impl_dualview_is_single_device::value)
+          if (std::is_same_v<typename mv_type::dual_view_type::t_dev::device_type, typename mv_type::dual_view_type::t_host::device_type>)
             TEUCHOS_ASSERT(tgt_mv->importsAreAliased());
           // else {
           //   We do not know if copyAndPermute was run on host or device.