Blockdiagonal factorizations refactor #329

Job	Run time
IntegrationTest (ITensorBase) / ITensorBase	1m 31s
IntegrationTest (KroneckerArrays) / KroneckerArrays	1m 19s
IntegrationTest (NamedDimsArrays) / NamedDimsArrays	1m 40s
IntegrationTest (QuantumOperatorDefinitions) / QuantumOperatorDefinitions	1m 23s
IntegrationTest (GradedArrays) / GradedArrays	1m 31s
IntegrationTest (FusionTensors) / FusionTensors	1m 32s
	8m 56s

Provide feedback