factor out network related (paths, clustering etc) functionality #335

Job	Run time
run-tests (matrix, base, ubuntu-latest, 3.9, false)	1m 54s
run-tests (matrix, base, ubuntu-latest, 3.10, false)	1m 55s
run-tests (matrix, base, ubuntu-latest, 3.11, false)	1m 57s
run-tests (matrix, base, ubuntu-latest, 3.12, false)	2m 18s
run-tests (tensor, base, ubuntu-latest, 3.9, false)	10m 5s
run-tests (tensor, base, ubuntu-latest, 3.10, false)	9m 57s
run-tests (tensor, base, ubuntu-latest, 3.11, false)	8m 22s
run-tests (tensor, base, ubuntu-latest, 3.12, false)	9m 42s
run-tests (macos-latest, matrix, base, 3.11, true)	2m 6s
run-tests (macos-latest, tensor, base, 3.11, false)	4m 36s
run-tests (windows-latest, matrix, openblas, 3.11, false, True)	5m 54s
run-tests (windows-latest, tensor, openblas, 3.11, false, True)	15m 3s
run-tests (torch, tensor, ubuntu-latest, 3.11, false)	9m 38s
run-tests (jax, tensor, ubuntu-latest, 3.11, false)	10m 39s
run-tests (tensorflow, tensor, ubuntu-latest, 3.11, false)	10m 34s
run-tests (slepc, matrix, ubuntu-latest, 3.11, false)	2m 9s
	1h 46m 49s

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