[CI/Build] Auto tag perf benchmarks related PRs

[22quinn]

Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
• The test results, such as pasting the results comparison before and after, or e2e results
• (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.

Purpose

Auto tag perf benchmarks related PRs

Test Plan

simulator

Test Result

#19929 tagged

(Optional) Documentation Update

[github-actions]

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[gemini-code-assist]

Summary of Changes

Hello @22quinn, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the CI/CD pipeline by introducing an automated labeling mechanism for pull requests. Its purpose is to streamline the identification and categorization of changes that impact performance benchmarks, ensuring better organization and traceability within the repository.

Highlights

• CI/CD Automation: A new Mergify rule has been added to automatically label pull requests that are related to performance benchmarks.
• Automated Labeling: Pull requests that modify files within the benchmarks/, tests/benchmarks/, or .buildkite/nightly-benchmarks/ directories will now automatically receive the perf-benchmarks label.

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[gemini-code-assist]

Code Review

This pull request introduces a new Mergify rule to automatically label PRs related to performance benchmarks. I've suggested adding another path (vllm/benchmarks/) to make the auto-labeling more comprehensive.

[DarkLight1337]

We already have a performance label, is there a need for a more specific one?

[22quinn]

@DarkLight1337 I was not aware there's a "performance" label. "perf-benchmarks" label is not new but agree we can converge to "performance"

[houseroad]

Looks good, thanks!