Support tpdp-ep sharding reshard

[sneaxiy]

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 tpdp-ep sharding reshard.

[paddle-bot]

Thanks for your contribution!

[codecov]

Codecov Report

Attention: Patch coverage is 13.58025% with 210 lines in your changes missing coverage. Please review.

Project coverage is 48.96%. Comparing base (51009f9) to head (7985e41).
Report is 1 commits behind head on incubate/paddlenlp-fleety_20250421.

❗ Current head 7985e41 differs from pull request most recent head c2c0537

Please upload reports for the commit c2c0537 to get more accurate results.

Files with missing lines	Patch %	Lines
paddlenlp/trainer/utils/sharding_io.py	7.69%	120 Missing ⚠️
paddlenlp/trainer/utils/reshard/common.py	16.04%	68 Missing ⚠️
paddlenlp/trainer/utils/reshard/sharding_v2.py	18.75%	13 Missing ⚠️
paddlenlp/trainer/training_args.py	41.66%	7 Missing ⚠️
paddlenlp/trainer/utils/reshard/sharding_v1.py	50.00%	2 Missing ⚠️

❌ Your patch status has failed because the patch coverage (13.58%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.
❌ Your project status has failed because the head coverage (48.96%) 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                           @@
##           incubate/paddlenlp-fleety_20250421   #10568      +/-   ##
======================================================================
+ Coverage                               48.94%   48.96%   +0.02%     
======================================================================
  Files                                     768      765       -3     
  Lines                                  126279   126281       +2     
======================================================================
+ Hits                                    61806    61833      +27     
+ Misses                                  64473    64448      -25     

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[ZHUI]

expert_tensor_parallel_degree 现在这几种 ep 的模式有空，最好统一一下，之前 gexiao 合入的时候说这个 expert_tensor_parallel_degree 好像一般不启用。