Switch back to cherrypick pat

We tried the default github pat, but that just wasn't doing it.
Hopefully with the other changes, this will be the last one needed to
get it working again.

Author: JacobCallahan

.github/workflows/prt_labels.yml

@@ -31,7 +31,7 @@ jobs:
           if: ${{ always() && steps.prt.outputs.result == 'not_found' }}
           uses: actions/github-script@v8
           with:
-            github-token: ${{ secrets.GITHUB_TOKEN }}
+            github-token: ${{ secrets.CHERRYPICK_PAT }}
             script: |
               const prNumber = '${{ github.event.number }}';
               const issue = await github.rest.issues.get({