[Cherry-Pick][Optimization] compulte real max_logprobs in batch (#5430)

[ckl117]

Motivation

每次根据batch 请求中的真实的logprob计算

Modifications

每次根据batch 请求中的真实的logprob计算

Usage or Command

无改变

Accuracy Tests

已有

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!

[codecov-commenter]

Codecov Report

❌ Patch coverage is 40.00000% with 15 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (release/2.4@4b9e2c5). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
fastdeploy/worker/gpu_model_runner.py	46.66%	6 Missing and 2 partials ⚠️
fastdeploy/engine/request.py	16.66%	4 Missing and 1 partial ⚠️
fastdeploy/model_executor/layers/sample/sampler.py	0.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@              Coverage Diff               @@
##             release/2.4    #5448   +/-   ##
==============================================
  Coverage               ?   59.08%           
==============================================
  Files                  ?      327           
  Lines                  ?    40576           
  Branches               ?     6159           
==============================================
  Hits                   ?    23976           
  Misses                 ?    14744           
  Partials               ?     1856           

Flag	Coverage Δ
GPU	59.08% <40.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.