Ability to source electron/positrons directly #5694

Job	Run time
Python 3.11 (omp=y, mpi=y, dagmc=n, libmesh=n, event=n vectfit=n)	1h 31m 28s
Python 3.11 (omp=y, mpi=n, dagmc=n, libmesh=n, event=n vectfit=n)	1h 53m 47s
Python 3.12 (omp=n, mpi=n, dagmc=, libmesh=, event= vectfit=)	57m 46s
Python 3.11 (omp=n, mpi=n, dagmc=n, libmesh=n, event=n vectfit=n)	1h 15m 36s
Python 3.11 (omp=y, mpi=y, dagmc=y, libmesh=, event= vectfit=)	1h 50m 0s
Python 3.13 (omp=n, mpi=n, dagmc=, libmesh=, event= vectfit=)	1h 1m 20s
Python 3.11 (omp=y, mpi=y, dagmc=, libmesh=y, event= vectfit=)	1h 50m 32s
Python 3.11 (omp=n, mpi=y, dagmc=n, libmesh=n, event=n vectfit=n)	1h 5m 14s
Python 3.11 (omp=y, mpi=n, dagmc=, libmesh=, event=y vectfit=)	1h 59m 57s
Python 3.11 (omp=y, mpi=n, dagmc=, libmesh=y, event= vectfit=)	1h 57m 55s
Python 3.11 (omp=n, mpi=y, dagmc=, libmesh=, event= vectfit=y)	1h 18m 3s
finish	3s
	16h 41m 41s

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