- search rocm hipblas with the find_package config method
 - use the official target name from rocm: roc::hipblas
 - export CMAKE_PREFIX_PATH in CHAMELEONConfig.cmake to let users find rocm hipblas the same way

starpu: add common functions to restructure the codelets by wrapping the stapu_mpi_data_task_echange functions and define a function to set common options to the tasks

starpu: detect the starpu_mpi_exchange_data_before_execution function to enable/disable the submit interface