Update default value of particlefile chunks to length of pset #367

Job	Run time
mypy	3m 48s
mypy	3m 48s
py3.13 \| macos \| integration tests	14m 52s
py3.13 \| macos \| integration tests	14m 52s
py3.13 \| macos \| unit tests	10m 12s
py3.13 \| macos \| unit tests	10m 12s
py3.13 \| ubuntu \| integration tests	17m 35s
py3.13 \| ubuntu \| integration tests	17m 13s
py3.13 \| ubuntu \| unit tests	13m 27s
py3.13 \| ubuntu \| unit tests	13m 27s
py3.13 \| windows \| integration tests	32m 7s
py3.13 \| windows \| integration tests	32m 7s
py3.13 \| windows \| unit tests	21m 25s
py3.13 \| windows \| unit tests	21m 25s
py3.10 \| ubuntu \| integration tests	18m 32s
py3.10 \| ubuntu \| integration tests	18m 32s
py3.10 \| ubuntu \| unit tests	12m 47s
py3.10 \| ubuntu \| unit tests	12m 47s
py3.11 \| ubuntu \| unit tests	12m 38s
py3.11 \| ubuntu \| unit tests	12m 38s
py3.12 \| ubuntu \| unit tests	13m 40s
py3.12 \| ubuntu \| unit tests	13m 40s
merge-test-artifacts	0s
merge-test-artifacts	3s
	5h 41m 47s

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