message: [GHA] add debug log when PR is not found
  We came across a PR where the land-blocking test cannot parse the PR
  number from the commit message in the GH push event. This commit logs
  the GH event's context payload when such edge cases happens.
  Closes:
  Approved by: andll
diff: @@ -41,6 +41,7 @@ jobs:
  pr_num = match[1];
  } else {
  console.warn("Did not find pull request num in commit message. -\\_(O_o)_/-");
  + console.log("GH event payload\n", context.payload);
  return;
  }
  // Read and check cluster test results
  