[AutoParallel] Open dynamic sharding CI test

[waliwali777]

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.

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Description

之前因为 paddle 中默认使用 FLAGS_fuse_reducescatter_in_opt 优化( PaddlePaddle/Paddle#73744 )，需要在 CI 中暂时关闭 sharding 相关单测( #10791 )
该 PR 修改sharding 单测的 loss_base，并再次打开

[paddle-bot]

Thanks for your contribution!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.74%. Comparing base (8fd74f0) to head (755312c).
Report is 12 commits behind head on develop.

❌ Your project check has failed because the head coverage (46.74%) 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   #10793      +/-   ##
===========================================
- Coverage    46.77%   46.74%   -0.03%     
===========================================
  Files          802      802              
  Lines       133646   133721      +75     
===========================================
+ Hits         62507    62513       +6     
- Misses       71139    71208      +69     

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