spikes in hydro outputs

[xiaocanli]

hydro outputs have some problems. For example, viy shown below has spikes at the corners of the local domains.

The issue can be fixed by switching to the kokkos version of synchronize_hydro_array in src/vpic/dump.cc

hydro_array->copy_to_host();
synchronize_hydro_array( hydro_array );

to

synchronize_hydro_array_kokkos(hydro_array);
hydro_array->copy_to_host();

The test was done on Perlmutter@NERSC. It was a reconnection run with 4 GPU nodes (16 GPUs in total).
vpic-kokkos was configured using

CRAYPE_LINK_TYPE=dynamic cmake \
  -DCMAKE_BUILD_TYPE=Release \
  -DENABLE_INTEGRATED_TESTS=ON \
  -DENABLE_UNIT_TESTS=ON \
  -DBUILD_INTERNAL_KOKKOS=ON \
  -DENABLE_KOKKOS_CUDA=ON \
  -DKokkos_ARCH_AMPERE80=ON \
  -DKokkos_ARCH_ZEN3=ON \
  -DKokkos_ENABLE_PTHREAD=OFF \
  -DKokkos_ENABLE_OPENMP=ON \
  -DCMAKE_CXX_COMPILER="CC" \
  -DCMAKE_CXX_FLAGS="-g -rdynamic"\
  $src_dir