Merge branch 'cineca/mpi' into 'develop'

src/Benchmarks/BLAS/array-operations.h

src/Benchmarks/BLAS/tnl-benchmark-blas.h

src/Benchmarks/Benchmarks.h

src/Benchmarks/CMakeLists.txt

src/Benchmarks/DistSpMV/CMakeLists.txt

src/Benchmarks/DistSpMV/ordering.h

src/Benchmarks/DistSpMV/tnl-benchmark-distributed-spmv.cpp

src/Benchmarks/DistSpMV/tnl-benchmark-distributed-spmv.cu

src/Benchmarks/DistSpMV/tnl-benchmark-distributed-spmv.h

src/Benchmarks/LinearSolvers/CMakeLists.txt

src/Benchmarks/LinearSolvers/CuSolverWrapper.h

src/Benchmarks/LinearSolvers/benchmarks.h

...Benchmarks/LinearSolvers/tnl-benchmark-linear-solvers.cpp

src/Benchmarks/LinearSolvers/tnl-benchmark-linear-solvers.cu

src/Benchmarks/LinearSolvers/tnl-benchmark-linear-solvers.h

src/TNL/DistributedContainers/DistributedArray.h

src/TNL/DistributedContainers/DistributedArrayView.h

src/TNL/DistributedContainers/DistributedArrayView_impl.h

src/TNL/DistributedContainers/DistributedArray_impl.h

src/TNL/DistributedContainers/DistributedMatrix.h