[Graph Optimization] Support deepseekV3 SOT Dy2St && CUDAGraph

[DrRyanHuang]

Motivation

支持 Deepseek V3 SOT 动转静 + 开启 CUDAGraph

Modifications

修改 Deepseek V3 组网，将两个 if 分支移出到新函数，并添加装饰器 @paddle.jit.marker.capture_control_flow 进行 AST 局部转静，前置PR:

• [SOT] Allow user specify a region to safe capture control flow Paddle#75548
• [SOT] Ensure run AST transformed function under graph_tracing_guard Paddle#76198
• [Dy2St] Move builtin.parameter to top in IR when ast dy2static Paddle#76190

Usage or Command

None

Accuracy Tests

None

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

[paddle-bot]

Thanks for your contribution!

[gongshaotian]

LGTM

[codecov-commenter]

Codecov Report

❌ Patch coverage is 94.44444% with 2 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@dda27e5). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...executor/layers/attention/mla_attention_backend.py	71.42%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #4785   +/-   ##
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  Coverage           ?   67.62%           
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  Files              ?      353           
  Lines              ?    45810           
  Branches           ?     7073           
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  Hits               ?    30979           
  Misses             ?    12579           
  Partials           ?     2252           

Flag	Coverage Δ
GPU	67.62% <94.44%> (?)

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