message: [GHA][LBT] alert flaky Cluster Test runs
  Alert oncall when flaky Cluster Test runs are detected in Land-blocking
  Test workflow.
  Closes:
  Approved by: rexhoffman
diff: @@ -50,15 +50,40 @@ jobs:
  if: steps.check_ks.outputs.should_run == 'true'
  # NOTE Remember to update PR comment payload if cti cmd is updated.
  run: |
  + set +e
  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 [ $return_code != 0 ]; then
  + jq -n \
  + --arg msg "*${{ github.job }}* job in ${{ github.workflow }} workflow failed.
  + $(tail -5 $CTI_OUTPUT_LOG)" \
  + --arg url "https://github.com/${{ github.repository }}/actions/runs/${{github.run_id}}" \
  + '{
  + "attachments": [
  + {
  + "text": $msg,
  + "actions": [
  + {
  + "type": "button",
  + "text": "Visit Job",
  + "url": $url
  + }
  + ]
  + }
  + ]
  + }' > /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
  