[llm]fix pp no drop last

[lugimzzz]

PR types

Bug fixes

PR changes

APIs

Description

eval 时修改pp batch_size 和 acc_step

[paddle-bot]

Thanks for your contribution!

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 52.84%. Comparing base (b5e3f0c) to head (aba0d89).
Report is 13 commits behind head on develop.

Files with missing lines	Patch %	Lines
paddlenlp/trainer/trainer.py	0.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #9439      +/-   ##
===========================================
- Coverage    53.01%   52.84%   -0.17%     
===========================================
  Files          678      676       -2     
  Lines       108787   108315     -472     
===========================================
- Hits         57668    57241     -427     
+ Misses       51119    51074      -45     

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[wawltor]

LGTM