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Fix seed when test apoz pruner #4580
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Description
Based on pruning by the threshold, we may have this situation, metrics = [0, 0, 1, 1, 2, 2], pruning 50%, then threshold=1 and 4 position will be masked, the real sparsity is 66.7%.
Apoz is easy to have repeated values in metrics when layer weight size is small.
To fix this issue by fixing seed.
TODO: Pruner needs to handle the metric equal to threshold more carefully.