[FDConfig] disable chunked_mm_input in ernie5

[kevincheng2]

Motivation

• ernie5 模型默认配置 disable_chunked_mm_input = True
• BosClient 创建失败时，提供更清晰的报错信息

Modifications

Usage or Command

Accuracy Tests

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 45.45455% with 6 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@9018ccf). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
fastdeploy/utils.py	0.00%	4 Missing ⚠️
fastdeploy/config.py	66.66%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #5774   +/-   ##
==========================================
  Coverage           ?   65.52%           
==========================================
  Files              ?      337           
  Lines              ?    43076           
  Branches           ?     6631           
==========================================
  Hits               ?    28225           
  Misses             ?    12750           
  Partials           ?     2101           

Flag	Coverage Δ
GPU	65.52% <45.45%> (?)

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