update muon_sharding_optimizer with rebuilding 2d_params.

[xxyux]

PR Category

Execute Infrastructure

PR Types

Improvements

Description

DevPR:#78814

是否引起精度变化

否

devPR:#78814

[paddle-bot]

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[sneaxiy]

LGTM

[xxyux]

/re-run all-failed

[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.67568% with 9 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (release/3.4@1105c37). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...d/fleet/meta_optimizers/muon_sharding_optimizer.py	74.28%	9 Missing ⚠️

❌ Your patch status has failed because the patch coverage (75.67%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@              Coverage Diff               @@
##             release/3.4   #78828   +/-   ##
==============================================
  Coverage               ?   75.67%           
==============================================
  Files                  ?        2           
  Lines                  ?       37           
  Branches               ?        0           
==============================================
  Hits                   ?       28           
  Misses                 ?        9           
  Partials               ?        0           

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[sneaxiy]

LGTM for coverage.