workflow-level PodSpecPatch is not applied to agent pod

[jswxstw]

Pre-requisites

• I have double-checked my configuration
• I can confirm the issues exists when I tested with :latest
• I'd like to contribute the fix myself (see contributing guide)

What happened/what did you expect to happen?

As shown in the following workflow demo, we set a workflow-level podSpecPatch to schedule the pod directly to the node named virtual-node.
However, HTTP Tempalte will create a agent pod and podSpecPatch was not applied to it.

Version

latest

Paste a small workflow that reproduces the issue. We must be able to run the workflow; don't enter a workflows that uses private images.

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: http-template-
  labels:
    workflows.argoproj.io/test: "true"
  annotations:
    workflows.argoproj.io/description: |
      Http template will demostrate http template functionality
    workflows.argoproj.io/version: '>= 3.2.0'
spec:
  podSpecPatch: |
    nodeName: virtual-node
  entrypoint: main
  templates:
    - name: main
      steps:
        - - name: good
            template: http
            arguments:
              parameters: [{name: url, value: "https://raw.githubusercontent.com/argoproj/argo-workflows/4e450e250168e6b4d51a126b784e90b11a0162bc/pkg/apis/workflow/v1alpha1/generated.swagger.json"}]
  
    - name: http
      inputs:
        parameters:
          - name: url
      http:
       # url: http:https://dummy.restapiexample.com/api/v1/employees
       url: "{{inputs.parameters.url}}"

Logs from the workflow controller

kubectl logs -n argo deploy/workflow-controller | grep ${workflow}

Logs from in your workflow's wait container

kubectl logs -n argo -c wait -l workflows.argoproj.io/workflow=${workflow},workflow.argoproj.io/phase!=Succeeded

[jswxstw]

The agent pod need to apply workflow level PodSpecPatch like the workflow pod does.

        # workflow/controller/agent.go
	if woc.execWf.Spec.HasPodSpecPatch() {
		patchedPodSpec, err := util.ApplyPodSpecPatch(pod.Spec, woc.execWf.Spec.PodSpecPatch)
		if err != nil {
			return nil, errors.Wrap(err, "", "Error applying PodSpecPatch")
		}
		pod.Spec = *patchedPodSpec
	}