ci: add override for github-ui / vrt

[joshblack]

Include github-ui / vrt as part of the overrides for the github-ui family of status checks

[changeset-bot]

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Latest commit: 55cd276

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[Copilot]

Pull request overview

This PR adds support for overriding the github-ui / vrt status check as part of the github-ui family of checks. This enables skipping VRT (Visual Regression Testing) checks when integration tests are skipped manually, maintaining consistency with the existing github-ui / ci and github-ui / projects status check overrides.

• Adds github-ui / vrt override in the pull request scenario (with label-based skipping)
• Adds github-ui / vrt override in the merge queue scenario
• Adds github-ui / vrt override in the issue comment command scenario (for fork PRs)