Head of build log is not useful in failures

Looks like https://ci.jenkins.io/job/Tools/job/bom/job/master/1751/ failed at the infrastructure level. Unfortunately https://plugins.jenkins.io/github-checks/ (unlike https://docs.cloudbees.com/docs/cloudbees-ci/latest/scm-integration/enabling-scm-reporting#_cloudbees_scm_reporting_feature_benefits) includes the head rather than the tail of a failed shell step’s log, which is usually useless, and does not link to the `execution/node/*/log/` for the [build-terminating error](https://javadoc.jenkins.io/plugin/workflow-api/org/jenkinsci/plugins/workflow/actions/ErrorAction.html#findOrigin(java.lang.Throwable,org.jenkinsci.plugins.workflow.flow.FlowExecution)).

_Originally posted by @jglick in https://github.com/jenkinsci/bom/issues/2121#issuecomment-1570137969_