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2b4f849d - [PipelineTesterMixin] Handle non-image outputs for attn slicing test (#2504)

[PipelineTesterMixin] Handle non-image outputs for attn slicing test (#2504) * [PipelineTesterMixin] Handle non-image outputs for batch/sinle inference test * style --------- Co-authored-by: William Berman <WLBberman@gmail.com>