【DCU】support dcu paged attention

[lifulll]

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

New features

PR changes

APIs

Description

support dcu paged attention

[paddle-bot]

Thanks for your contribution!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.70%. Comparing base (762a680) to head (6839467).
Report is 51 commits behind head on develop.

❌ Your project check has failed because the head coverage (49.70%) 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   #10227      +/-   ##
===========================================
- Coverage    49.99%   49.70%   -0.30%     
===========================================
  Files          757      761       +4     
  Lines       122442   124213    +1771     
===========================================
+ Hits         61219    61737     +518     
- Misses       61223    62476    +1253     

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