Add test script for LC's matrix

TODO:

• cmake-cuda-um-dbg
• cmake-cuda-um-mixedint
• cmake-cuda-um-shared
• cmake-cuda-um-single
• cmake-cuda-um-without-MPI
• cmake-cuda-cpu
• cmake-cuda-bench
• Autotools (same as CMake but without runs)
• cmake-cuda-cpu baselines (Not needed since we rely on the .saved files used by tux)

Notes:

• Internal code changes are needed to get the tests working when building hypre with GPU support on a machine without GPUs (e.g., dane) while setting the execution policy to host.
• hypre's internal memory tracker was disabled temporarily due to crashes on matrix. To be investigated.
• Residual tolerance for a couple of TEST_ij/solvers.sh runs was lowered so we can reuse the same saved files as tux when building with GPU support but setting the execution policy to host
• Runs on a single node of matrix. Currently takes about 6h (to be improved)
• Example job script for launching on matrix below:

#!/bin/bash
#SBATCH -t 10:00:00
#SBATCH -p pbatch
#SBATCH -J hypre
#SBATCH -o machine-matrix.out
#SBATCH -e machine-matrix.err
#SBATCH -N 1
#SBATCH -G 4
#SBATCH --exclusive

### Shell scripting
date; hostname; git branch --show-current
pwd=`pwd`
cd $(pwd)/AUTOTEST
echo -e "Current directory: $(pwd)"

### Launch parallel executable
./test.sh ./machine-matrix.sh ../src

date;
echo 'Done'