feat: add issue labeling workflow

[xing-yiren]

Description

• Add issue labeling workflow
• Add code reviewers of .github and tmp repositories for reviewer assignment workflow testing

Changes

• Add issue labeling workflow
• Add code reviewers of .github and tmp repositories for reviewer assignment workflow testing

Testing & Benchmark

Checklist

• Read and followed the Contributing Guidelines.
• Self-tested locally to ensure the code runs correctly and achieves expected results (all CI checks expected to pass).
• Updated documentation if needed.
• Verified accuracy or performance benchmarks if applicable.

Reviewers

[mindspore-courses-bot]

The following reviewers have been auto-assigned: @lvyufeng @wang-hua-2019.
Please proceed with the review at your earliest convenience. You may also request additional reviewers if appropriate. Thank you.

[mindspore-courses-bot]

The following reviewers have been auto-assigned: @lvyufeng @wang-hua-2019.
Please proceed with the review at your earliest convenience. You may also request additional reviewers if appropriate. Thank you.