Tests

add streamlined backend branch to workflow tests #541

Job	Run time
test (ubuntu-latest, 3.10, jax)	16s
test (ubuntu-latest, 3.10, numpy)	16s
test (ubuntu-latest, 3.10, tensorflow)	18s
test (ubuntu-latest, 3.10, torch)	16s
test (ubuntu-latest, 3.11, jax)	16s
test (ubuntu-latest, 3.11, numpy)	13s
test (ubuntu-latest, 3.11, tensorflow)	17s
test (ubuntu-latest, 3.11, torch)	16s
test (windows-latest, 3.10, jax)	17s
test (windows-latest, 3.10, numpy)	15s
test (windows-latest, 3.10, tensorflow)	16s
test (windows-latest, 3.10, torch)	15s
test (windows-latest, 3.11, jax)	12s
test (windows-latest, 3.11, numpy)	15s
test (windows-latest, 3.11, tensorflow)	15s
test (windows-latest, 3.11, torch)	14s
	4m 7s

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