add infer aishell1 subtest demo in paraformer-large-contextual

lzr265946

2023-02-15 d2755f476872da773b816b3952acef97e1ee9336

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beam_size: 10
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 1.0
lm_weight: 0.7