fix model save for moe_sharding

[DrownFish19]

PR types

Bug fixes

PR changes

APIs

Description

修复moe_sharding并行策略下，模型保存因缺少moe rank导致相同文件名覆盖问题

相关PR：
paddlenlp dev：PaddlePaddle/PaddleNLP#11162
paddlenlp fleety0421: PaddlePaddle/PaddleNLP#11155
paddleformers dev: #2846
paddleformers fleety1103: #2847

[paddle-bot]

Thanks for your contribution!

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@bb7cdd5). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
paddleformers/trainer/training_args.py	0.00%	2 Missing ⚠️

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #2847   +/-   ##
==========================================
  Coverage           ?   28.74%           
==========================================
  Files              ?      343           
  Lines              ?    57156           
  Branches           ?        0           
==========================================
  Hits               ?    16432           
  Misses             ?    40724           
  Partials           ?        0           

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[DesmonDay]

LGTM