message: [GHA][LBT] add repro cmd to PR comment
  Include the cluster test cmd used in the land-blocking test workflow to
  help repro failures locally.
  Closes:
  Approved by: andll
diff: @@ -29,6 +29,7 @@ jobs:
  docker/build-aws.sh --build-all --version $LIBRA_GIT_REV --addl_tags canary
  - name: Launch cluster test
  if: steps.check_ks.outputs.should_run == 'true'
  + # NOTE Remember to update PR comment payload if cti cmd is updated.
  run: |
  JUMPHOST=${{secrets.CLUSTER_TEST_JUMPHOST}} \
  ./scripts/cti \
  @@ -89,6 +90,21 @@ jobs:
  // Post comment on PR then fail this workflow
  should_fail = true;
  }
  + // Add repro cmd to message
  + try {
  + let env_vars = process.env;
  + body += "\nRepro cmd:\n";
  + body += `
  + ./scripts/cti --tag dev_${env_vars.LIBRA_GIT_REV} --run bench
  + `;
  + } catch (err) {
  + if (err.code === 'ReferenceError') {
  + console.error("env var $LIBRA_GIT_REV is not set.");
  + } else {
  + body += "[GHA DEBUG]\nFound error in actions/github-script\n";
  + body += err;
  + }
  + }
  // Post test result on original pull request
  try {
  await github.issues.createComment(
  