[GPT-3] fix auto_engine and eager_engine, add inference script

[vivienfanghuagood]

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[paddle-bot]

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[codecov]

Codecov Report

Merging #5563 (7722a4f) into develop (8737f68) will decrease coverage by 0.54%.
The diff coverage is 49.19%.

❗ Current head 7722a4f differs from pull request most recent head b12b9a4. Consider uploading reports for the commit b12b9a4 to get more accurate results

@@             Coverage Diff             @@
##           develop    #5563      +/-   ##
===========================================
- Coverage    59.29%   58.76%   -0.54%     
===========================================
  Files          481      481              
  Lines        68107    68058      -49     
===========================================
- Hits         40386    39995     -391     
- Misses       27721    28063     +342     

Impacted Files	Coverage Δ
paddlenlp/data/data_collator.py	56.88% <ø> (ø)
paddlenlp/transformers/distilbert/modeling.py	100.00% <ø> (ø)
paddlenlp/transformers/model_utils.py	49.61% <ø> (-1.31%)	⬇️
paddlenlp/transformers/reformer/modeling.py	75.66% <ø> (+0.73%)	⬆️
paddlenlp/transformers/bloom/modeling.py	14.28% <12.50%> (-39.61%)	⬇️
paddlenlp/transformers/bloom/configuration.py	44.44% <25.00%> (-55.56%)	⬇️
paddlenlp/transformers/generation_utils.py	71.25% <62.50%> (ø)
paddlenlp/transformers/blip_2/modeling.py	79.84% <66.66%> (ø)
paddlenlp/transformers/bigbird/modeling.py	79.82% <100.00%> (ø)
paddlenlp/transformers/blenderbot/modeling.py	82.77% <100.00%> (+0.39%)	⬆️
... and 14 more

... and 1 file with indirect coverage changes

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[sijunhe]

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