Fix the issue of loading ckpt when retraining

[Ace-To-HYB]

PR types

Bug fixes

PR changes

Description

修复“开UC TP+PP/TP+SP+PP时断点重训无法加载权重”问题

[paddle-bot]

Thanks for your contribution!

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@b82939d). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
paddleformers/trainer/unified_checkpoint/utils.py	0.00%	5 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    #2645   +/-   ##
==========================================
  Coverage           ?   29.48%           
==========================================
  Files              ?      311           
  Lines              ?    54250           
  Branches           ?        0           
==========================================
  Hits               ?    15997           
  Misses             ?    38253           
  Partials           ?        0           

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[lugimzzz]

LGTM