[AutoParallel]Change the trigger position of autodp fake r to s

[Difers]

PR Category

Auto Parallel

PR Types

Bug fixes

Description

Pcard-73145
提前auto dp的replicate_grad_to_partial操作到sharding 优化之前，避免对后续优化操作造成影响

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[liym27]

这里的 _convert_fake_replicate_grad_to_partial 是不是不需要了，前边已经转过了，到这里任何场景下都不需要 replicated to partial

[AndSonder]

这里的 _convert_fake_replicate_grad_to_partial 是不是不需要了，前边已经转过了，到这里任何场景下都不需要 replicated to partial

这里有需要的，原本 auto dp mode 下是可以不调用 shard optimizer 的，如果去掉的话，就必须调用 shard optimize 才能用 auto dp 了

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 70.00000% with 3 lines in your changes missing coverage. Please review.

Please upload report for BASE (develop@98204ab). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
python/paddle/distributed/auto_parallel/api.py	50.00%	2 Missing ⚠️
.../paddle/distributed/auto_parallel/auto_dp_utils.py	80.00%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (70.00%) 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             @@
##             develop   #74243   +/-   ##
==========================================
  Coverage           ?   70.00%           
==========================================
  Files              ?        3           
  Lines              ?       10           
  Branches           ?        0           
==========================================
  Hits               ?        7           
  Misses             ?        3           
  Partials           ?        0           

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