[infer]support output length truncated

[ckl117]

Before submitting

• Lint code. If there are lint issues, please format the code first.

# Install and register `pre-commit` in the project folder
pip install pre-commit && pre-commit install

# Process previous code files separately
pre-commit run --file XXXX.py

• Add test cases into tests folder. If there are codecov issues, please add tests cases first.

PR types

Others

PR changes

Others

Description

支持输出过长截断时，保留最后一个有效token

[paddle-bot]

Thanks for your contribution!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.94%. Comparing base (ddcb722) to head (ca80acb).
Report is 5 commits behind head on develop.

❌ Your project status has failed because the head coverage (46.94%) is below the target coverage (58.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #10614   +/-   ##
========================================
  Coverage    46.94%   46.94%           
========================================
  Files          799      799           
  Lines       132348   132348           
========================================
  Hits         62137    62137           
  Misses       70211    70211           

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