[Metax][CI]Change Jenkins trigger group from APPROVAL to GZ_BD-CPU

[plusNew001]

Motivation

💡 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

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!

[plusNew001]

/skip all

[Copilot]

Pull request overview

该 PR 调整 Metax 相关的 GitHub Actions 工作流，使其在触发 Jenkins 任务时不再使用 APPROVAL runner group，而改为使用 GZ_BD-CPU，以匹配新的 CI 运行资源/权限分组。

Changes:

• 将 .github/workflows/ci_metax.yml 中 runs-on.group 从 APPROVAL 修改为 GZ_BD-CPU，影响 Metax PR 的 Jenkins 触发作业运行位置。

补充提醒：该 PR 当前描述信息基本未填写（Motivation/Modifications/Tests 等），建议补充变更原因与验证方式；另外标题建议在最后一个 tag 后增加空格以贴合模板示例格式。此变更一般不需要面向用户的文档更新，但如果仓库/团队内部有 CI runner group 说明文档，建议同步更新。