Fix reports cleanup jobs using local actions without repository checkout

[coisa]

Summary

The packaged reports.yml workflow fails in preview-cleanup jobs after the recent extraction of GitHub Pages helpers into local actions under .github/actions/github-pages/.

Failure

Cleanup Pull Request Preview fails with:

Error: Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under '/home/runner/work/dev-tools/dev-tools/.github/actions/github-pages/remove-preview'. Did you forget to run actions/checkout before running your local action?

Root Cause

The affected cleanup jobs checkout only the gh-pages branch into path: gh-pages, but they do not checkout the repository workspace containing .github/actions/github-pages/* before invoking those local actions.

That means the action path does not exist in the runner workspace even though the workflow itself is valid.

Scope

• cleanup_preview
• cleanup_orphaned_previews
• verify whether any other reports/wiki/board job invokes local actions without first checking out the repository root

Expected Fix

• ensure jobs that invoke local actions have a repository-root checkout available in the workspace
• keep the gh-pages checkout used for preview cleanup logic
• add focused validation so this regression is less likely to recur