Cannot create WorkflowTemplate if using {{workflow.labels.*}}

[simster7]

apiVersion: argoproj.io/v1alpha1
kind: WorkflowTemplate
metadata:
  generateName: test-foobar-
  labels:
    testLabel: foobar
spec:
  entrypoint: whalesay
  templates:
    - name: whalesay
      resubmitPendingPods: true
      container:
        image: docker/whalesay
      metrics:
        prometheus:
          - name: intuit_data_persistplat_dppselfservice_workflow_test_duration
            help: Duration of workflow
            labels:
              - key: label
                value: "{{workflow.labels.testLabel}}"
            gauge:
              realtime: true
              value: "{{duration}}"

Gives

Failed to create workflow template: templates.whalesay: failed to resolve {{workflow.labels.testLabel}}

[apiwoni]

@simster7 @alexec If this has been fixed while back then you have regression bug? In v3.4.4 unless actual Workflow resource specifies label the usage of {{workflow.labels.*}} in WorkflowTemplate is not substituted even when label is specified in WorkflowTemplate as shown above. In v3.4.16 this actually fails validation if not passed by invoking workflow.

[tooptoop4]

maybe related to #13141