Preserve collision count when splitting particles #8606

Job	Run time
filter-changes	5s
Python 3.13 (omp=n, mpi=n, dagmc=, libmesh=, event=	22m 30s
Python 3.12 (omp=n, mpi=n, dagmc=n, libmesh=n, event=n	21m 33s
Python 3.12 (omp=n, mpi=y, dagmc=n, libmesh=n, event=n	28m 36s
Python 3.12 (omp=y, mpi=y, dagmc=y, libmesh=, event=	49m 34s
Python 3.12 (omp=y, mpi=y, dagmc=, libmesh=y, event=	44m 46s
Python 3.12 (omp=y, mpi=n, dagmc=n, libmesh=n, event=n	30m 59s
Python 3.14 (omp=n, mpi=n, dagmc=, libmesh=, event=	26m 38s
Python 3.14t (omp=n, mpi=n, dagmc=, libmesh=, event=	26m 42s
Python 3.12 (omp=y, mpi=n, dagmc=, libmesh=y, event=	44m 32s
Python 3.12 (omp=y, mpi=y, dagmc=n, libmesh=n, event=n	32m 8s
Python 3.12 (omp=y, mpi=n, dagmc=, libmesh=, event=y	34m 58s
coverage	5s
Check CI status	2s
	6h 3m 8s

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