message: [GHA] update flaky Cluster Test alert in LBT
  Set the alert when the Cluster Test report is not found in LBT.
  Closes:
  Approved by: ankushagarwal
diff: @@ -29,6 +29,7 @@ jobs:
  if: steps.check_ks.outputs.should_run == 'true'
  run: |
  set +e
  + date
  RETRYABLE_EXIT_CODE=2
  for ((i = 0; i < 3; i++)); do
  echo "Build attempt $i"
  @@ -51,14 +52,19 @@ jobs:
  # NOTE Remember to update PR comment payload if cti cmd is updated.
  run: |
  set +e
  + date
  export CTI_OUTPUT_LOG=$(mktemp)
  echo "::set-env name=CTI_OUTPUT_LOG::$CTI_OUTPUT_LOG"
  ./scripts/cti \
  --tag ${TEST_TAG} \
  --report report.json \
  --run bench
  - return_code=$?
  - if [ $return_code != 0 ]; then
  + if [ -s "report.json" ]; then
  + echo "report.json start"
  + cat report.json
  + echo "report.json end"
  + else
  + echo "report.json is empty or not found."
  jq -n \
  --arg msg "*${{ github.job }}* job in ${{ github.workflow }} workflow failed.
  $(tail -5 $CTI_OUTPUT_LOG)" \
  @@ -79,11 +85,6 @@ jobs:
  }' > /tmp/payload
  curl -X POST -H 'Content-type: application/json' -d @/tmp/payload ${{ secrets.WEBHOOK_FLAKY_LAND_BLOCKING_CT }}
  fi
  - if [ -e "report.json" ]; then
  - echo "report.json start"
  - cat report.json
  - echo "report.json end"
  - fi
  - name: Post test results on PR
  if: steps.check_ks.outputs.should_run == 'true'
  uses: actions/github-script@0.4.0
  