This PR removes:
MORSE_TASK_flush_[all|desc|data]( options, ... )functions
RUNTIME_desc_flush( desc, sequence)that flushes and brings back to cpu asynchronously a full descriptor
RUNTIME_data_flush( sequence, A, m, n)that flushes the piece of data A(m,n) and brings it back to the cpu if needed.
RUNTIME_flush()that flushes all caches, but should be useless as we need to flush all descriptors used in the algorithms.
MORSE_Desc_Flush( desc, sequence)to replace
MORSE_Desc_Getoncpu( desc )that was synchronous
All algorithms have been updated to use those new functions.