pvNVIDIAIndeX: fix `clang-tidy` `bugprone-undefined-memory-manipulation` lints

These are suppressed because `mi::math::Vector` is supposed to be a POD
type, but is not for some reason. This should be investigated.

Plugins/pvNVIDIAIndeX/src/vtknvindex_irregular_volume_importer.cxx

@@ -438,6 +438,7 @@ nv::index::IDistributed_data_subset* vtknvindex_irregular_volume_importer::creat
   }
 
   // Copy vertices.
+  // NOLINTNEXTLINE(bugprone-undefined-memory-manipulation)
   memcpy(mesh_storage.vertices, subset_vertices.data(),
     subset_vertices.size() * sizeof(mesh_storage.vertices[0]));
 

Plugins/pvNVIDIAIndeX/src/vtknvindex_regular_volume_properties.cxx

@@ -431,6 +431,7 @@ bool vtknvindex_regular_volume_properties::write_shared_memory(
     mi::math::Vector<mi::Float64, 3> point_pv;
     ugrid->GetPoint(i, point_pv.begin());
     const mi::math::Vector<mi::Float32, 3> point_index(point_pv);
+    // NOLINTNEXTLINE(bugprone-undefined-memory-manipulation)
     memcpy(shm_offset, &point_index, size_elm);
     shm_offset += size_elm;
   }