[automated] Apply ESLint and Oxfmt fixes

The backport job checked out with the default GITHUB_TOKEN and reused those
credentials for `git push`. GitHub refuses to let that token create or update
files under .github/workflows/**, so any PR that also touches a workflow file
fails the push with:

  ! [remote rejected] ... (refusing to allow a GitHub App to create or update
    workflow `.github/workflows/ci-tests-e2e.yaml` without `workflows` permission)

Because the run step inherits `set -e`, the loop aborted before writing the
`failed=` output, so the "Comment on failures" step posted nothing - the
backport just silently failed (see PR #12804: cherry-pick succeeded on every
target, only the push was rejected, and all four had to be created by hand).

Check out with PR_GH_TOKEN - already used by the Create-PR step - so the push
carries `workflow` scope. PR_GH_TOKEN must have workflow write permission for
this to take effect.

.github/workflows/pr-backport.yaml

@@ -67,6 +67,11 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 0
+          # Persist a token with `workflow` scope so the backport push can
+          # include changes to .github/workflows/**. The default GITHUB_TOKEN
+          # is refused by GitHub when a push creates/updates workflow files,
+          # which silently aborted the whole job (see PR #12804 backport).
+          token: ${{ secrets.PR_GH_TOKEN }}
 
       - name: Configure git
         run: |