CPAlgorithms: implement pseudo-data smearing for Full JER systematics
As described in JetUncertaintiesRel22, for the "Full" or "All" JER uncertainty models, one needs to run the JetUncertaintiesTool twice, once in MC-mode and once in data-mode.
As described in JetUncertaintiesRel22, for the "Full" or "All" JER uncertainty models, one needs to run the JetUncertaintiesTool twice, once in MC-mode and once in data-mode.