optimize affect calls to reset_aggregated_jumps!

[isaacsas]

With the new callback code, we should work towards passing reset_aggregated_jumps! indices of parameters and/or unknowns that have changed. Combined with SciML/JumpProcesses.jl#484 that should provide a much more performant way to handle affect callback updates (as opposed to the current approach, which completely reinitializes the underlying aggregator).