ocl: moved common code into separate OpenCL/header files #1445

Job	Run time
build-on-cuda (OPENMP=ON)	7m 50s
build-and-test (MPI=ON, OPENMP=ON, SMM=blas, openmpi)	4m 10s
build-and-test (MPI=ON, OPENMP=ON, SMM=blas, mpich)	3m 54s
build-on-opencl (OPENMP=ON, SMM=libxsmm)	8m 34s
build-and-test (MPI=ON, OPENMP=ON, SMM=libxsmm, openmpi)	3m 56s
build-and-test (MPI=ON, OPENMP=ON, SMM=libxsmm, mpich)	3m 44s
build-and-test (MPI=ON, OPENMP=OFF, SMM=blas, openmpi)	9m 12s
pre-commit	1m 4s
build-and-test (MPI=ON, OPENMP=OFF, SMM=blas, mpich)	10m 19s
build-and-test (MPI=ON, OPENMP=OFF, SMM=libxsmm, openmpi)	9m 1s
build-on-rocm (OPENMP=ON)	8m 17s
build-and-test (MPI=ON, OPENMP=OFF, SMM=libxsmm, mpich)	9m 14s
build-and-test (MPI=OFF, OPENMP=ON, SMM=blas, openmpi)	6m 27s
build-and-test (MPI=OFF, OPENMP=ON, SMM=libxsmm, openmpi)	5m 7s
build-and-test (MPI=OFF, OPENMP=OFF, SMM=blas, openmpi)	3m 32s
build-and-test (MPI=OFF, OPENMP=OFF, SMM=libxsmm, openmpi)	4m 0s
Combine & check coverage.	46s
	1h 39m 7s

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