Amend memory hierarchy for kp::Operations so they can be created separately

[axsaucedo]

Currently kp::Operations own commandbuffers which makes them dependent to sequences on the memory hierarchy, however from further assessment this can be removed such that the commandbuffer is only passed for recording commands. This would allow kp::Operation memory to be managed by the top level kp::Manager which then would enable for kp::Operations to be created dynamically and initialised separate to Sequences, Managers and Tensors. This would allow also for much more dynamic interaction with these objectsi in the Python bindings.