Fix the AddLabel workflow permission issue

[xibinliu]

Description

Fix the AddLabel workflow permission issue, and also allow the action to be run manually by giving the pull request number.

This is the failed AddLabel run example

Tests

None

Checklist

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• I have made or will make corresponding changes to the doc if needed, including adding new documentation pages to the relevant Table of Contents (toctree directive) as explained in our documentation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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