[Optimization]Fix tool parser

[luukunn]

Motivation

修复tool_parser中过滤\n或者空格的问题

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]]
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• Add unit tests. Please write the reason in this PR if no unit tests.
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[paddle-bot]

Thanks for your contribution!

[Copilot]

Pull request overview

该 PR 旨在修复/重构 OpenAI entrypoint 下 Ernie 工具调用（tool_call）解析逻辑，重点调整 ernie-x1 的非流式与流式解析实现，并同步改动了 ernie-45-vl-thinking 的流式处理细节。

Changes:

• 重写 ErnieX1ToolParser.extract_tool_calls()：改为基于正则提取并直接 json.loads。
• 重写 ErnieX1ToolParser.extract_tool_calls_streaming()：调整流式解析与增量输出逻辑、日志接口。
• 移除 ernie-x1 的单测文件；并在 ernie_45_vl_thinking 流式解析中删除“空 chunk 跳过”逻辑。

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 7 comments.

File	Description
tests/entrypoints/openai/tool_parsers/test_ernie_x1_tool_parser.py	删除了 Ernie X1 tool parser 的单元测试覆盖。
fastdeploy/entrypoints/openai/tool_parsers/ernie_x1_tool_parser.py	大幅改动非流式/流式 tool_call 解析实现与返回结构。
fastdeploy/entrypoints/openai/tool_parsers/ernie_45_vl_thinking_tool_parser.py	流式解析逻辑中不再跳过空 delta chunk。

[codecov-commenter]

Codecov Report

❌ Patch coverage is 93.18182% with 9 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@76cf5e9). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...points/openai/tool_parsers/ernie_x1_tool_parser.py	93.18%	5 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #7079   +/-   ##
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  Coverage           ?   73.15%           
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  Files              ?      402           
  Lines              ?    56421           
  Branches           ?     8894           
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  Hits               ?    41273           
  Misses             ?    12250           
  Partials           ?     2898           

Flag	Coverage Δ
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