[Feature] support audio tts

[ming1753]

Motivation

support audio tts

💡 If this PR is a Cherry Pick, the PR title needs to follow the format by adding the [Cherry-Pick] label at the very beginning and appending the original PR ID at the end. For example, [Cherry-Pick][CI] Add check trigger and logic(#5191)

💡 如若此PR是Cherry Pick，PR标题需遵循格式，在最开始加上[Cherry-Pick]标签，以及最后面加上原PR ID，例如[Cherry-Pick][CI] Add check trigger and logic(#5191)

Modifications

add aduio_content & support audio frame aggregation

Usage or Command

Not need

Accuracy Tests

Not need

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.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 65.71429% with 12 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@3e2c13d). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...stdeploy/entrypoints/openai/response_processors.py	77.77%	2 Missing and 4 partials ⚠️
fastdeploy/entrypoints/openai/serving_chat.py	0.00%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #5333   +/-   ##
==========================================
  Coverage           ?   59.34%           
==========================================
  Files              ?      324           
  Lines              ?    40090           
  Branches           ?     6062           
==========================================
  Hits               ?    23792           
  Misses             ?    14408           
  Partials           ?     1890           

Flag	Coverage Δ
GPU	59.34% <65.71%> (?)

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[paddle-bot]

Thanks for your contribution!