Tests

more support for PBC and AG operations like summing #240

Job	Run time
run-tests (matrix, base, ubuntu-latest, 3.9, false)	1m 51s
run-tests (matrix, base, ubuntu-latest, 3.10, false)	1m 57s
run-tests (matrix, base, ubuntu-latest, 3.11, false)	2m 10s
run-tests (tensor, base, ubuntu-latest, 3.9, false)	8m 2s
run-tests (tensor, base, ubuntu-latest, 3.10, false)	7m 46s
run-tests (tensor, base, ubuntu-latest, 3.11, false)	9m 35s
run-tests (macos-latest, matrix, base, 3.11, true)	3m 31s
run-tests (macos-latest, tensor, base, 3.11, false)	10m 15s
run-tests (windows-latest, matrix, base, 3.11, false)	5m 45s
run-tests (windows-latest, tensor, base, 3.11, false)	10m 6s
run-tests (torch, tensor, ubuntu-latest, 3.11, false)	9m 54s
run-tests (jax, tensor, ubuntu-latest, 3.11, false)	9m 27s
run-tests (tensorflow, tensor, ubuntu-latest, 3.11, false)	9m 37s
run-tests (slepc, matrix, ubuntu-latest, 3.11, false)	2m 33s
	1h 32m 29s

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