ci: use check-success instead of status-success for GitHub Actions #35188
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Reason for this change
After removing the CodeBuild requirement from Mergify in #35174, automatic PR merging stopped working. Mergify was looking for status-success=validate-pr and status-success=build, but GitHub Actions creates check runs, not statuses. CodeBuild used the GitHub Status API, while GitHub Actions uses the GitHub Checks API.
Description of changes
Changed all Mergify conditions from status-success=validate-pr and status-success=build to check-success=validate-pr and check-success=build to match what GitHub Actions actually creates.
The previous configuration worked because Mergify was only waiting for the CodeBuild status (which was correctly configured), while the GitHub Actions conditions were silently failing but not blocking merges.
Describe any new or updated permissions being added
NA
Description of how you validated changes
Analyzed GitHub API responses for recent PRs to confirm:
• CodeBuild creates statuses via GitHub Status API
• GitHub Actions creates check runs via GitHub Checks API
• Verified that approved PRs have successful validate-pr and build check runs but no corresponding statuses
Checklist
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license