[CI] Improve Code Prepare stability and cleanup logic

[EmmonsCurse]

Motivation

The Code Prepare stage has stability issues on self-hosted runners, especially when jobs are cancelled. In such cases, residual directories or root-owned files may remain in the workspace, causing subsequent runs to fail during cleanup or extraction.

The previous cleanup logic relied only on container-based deletion, which is not reliable under abnormal termination or permission inconsistency, leading to CI flakiness.

Modifications

• Add host-level cleanup to remove residual directories using runner user
• Introduce retry mechanism to improve cleanup reliability
• Add container-based root cleanup as a fallback
• Handle permission issues with force cleanup (chmod + find)
• Improve logging for better observability and debugging
• Add pre-check before extraction to avoid conflicts with existing directories
• Use --no-same-owner during extraction to prevent permission issues

Usage or Command

N/A

Accuracy Tests

N/A

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.

[EmmonsCurse]

/skip-ci ci_iluvatar
/skip-ci ci_hpu
/skip-ci build_xpu

[paddle-bot]

Thanks for your contribution!

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

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  Misses             ?    11414           
  Partials           ?     2716           

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