add llama dpo pp

[lugimzzz]

PR types

New features

PR changes

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Description

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[paddle-bot[bot]]

Thanks for your contribution!

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 22.91667% with 74 lines in your changes missing coverage. Please review.

Project coverage is 54.25%. Comparing base (53ad2da) to head (a253ab6). Report is 337 commits behind head on develop.

Files with missing lines	Patch %	Lines
paddlenlp/transformers/llama/modeling.py	21.87%	50 Missing :warning:
paddlenlp/datasets/zero_padding_dataset.py	17.85%	23 Missing :warning:
paddlenlp/transformers/llama/modeling_pp.py	0.00%	1 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8435      +/-   ##
===========================================
- Coverage    55.43%   54.25%   -1.18%     
===========================================
  Files          616      617       +1     
  Lines        96243    96442     +199     
===========================================
- Hits         53348    52322    -1026     
- Misses       42895    44120    +1225     

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