fix: improper selfLinks for cluster-scoped resources. Fixes #9320

[Kyle-Wong]

Fixes #9320

Tested by running a workflow with successCondition and a cluster-scoped resource.
Workflow:

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  name: kubeflow
spec:
  activeDeadlineSeconds: 600
  entrypoint: entry
  serviceAccountName: default
  templates:
  - name: entry
    retryStrategy:
      limit: 2
      retryPolicy: "Always"
    steps:
    - - name: prereq-resources
        template: prereq-resources-install
  - name: prereq-resources-install
    resource:
      action: apply
      successCondition: status.phase == Active
      manifest: |
        apiVersion: v1
        kind: Namespace
        metadata:
          name: kubeflow

output:

time="2022-08-16T18:03:25.695Z" level=info msg="Starting Workflow Executor" version=latest+9680ec0.dirty
time="2022-08-16T18:03:25.699Z" level=info msg="Using executor retry strategy" Duration=1s Factor=1.6 Jitter=0.5 Steps=5
time="2022-08-16T18:03:25.699Z" level=info msg="Executor initialized" deadline="2022-08-16 18:13:22 +0000 UTC" includeScriptOutput=false namespace=argo podName=kubeflow-prereq-resources-install-3024519692 template="{\"name\":\"prereq-resources-install\",\"inputs\":{},\"outputs\":{},\"metadata\":{},\"resource\":{\"action\":\"apply\",\"manifest\":\"apiVersion: v1\\nkind: Namespace\\nmetadata:\\n  name: kubeflow\\n\",\"successCondition\":\"status.phase == Active\"},\"archiveLocation\":{\"archiveLogs\":true,\"s3\":{\"endpoint\":\"minio:9000\",\"bucket\":\"my-bucket\",\"insecure\":true,\"accessKeySecret\":{\"name\":\"my-minio-cred\",\"key\":\"accesskey\"},\"secretKeySecret\":{\"name\":\"my-minio-cred\",\"key\":\"secretkey\"},\"key\":\"kubeflow/kubeflow-prereq-resources-install-3024519692\"}}}" version="&Version{Version:latest+9680ec0.dirty,BuildDate:2022-08-15T21:01:43Z,GitCommit:9680ec01384cc7289b13dd95e57541a95f5a71cb,GitTag:untagged,GitTreeState:dirty,GoVersion:go1.18.5,Compiler:gc,Platform:linux/amd64,}"
time="2022-08-16T18:03:25.699Z" level=info msg="Loading manifest to /tmp/manifest.yaml"
time="2022-08-16T18:03:25.699Z" level=info msg="kubectl apply -f /tmp/manifest.yaml -o json"
time="2022-08-16T18:03:25.950Z" level=info msg="Resource: /namespace./kubeflow. SelfLink: api/v1/namespaces/kubeflow"
time="2022-08-16T18:03:25.950Z" level=info msg="Waiting for conditions: status.phase==Active"
time="2022-08-16T18:03:25.960Z" level=info msg="Get namespaces 200"
time="2022-08-16T18:03:25.960Z" level=info msg="success condition '{status.phase == [Active]}' evaluated true"
time="2022-08-16T18:03:25.960Z" level=info msg="1/1 success conditions matched"
time="2022-08-16T18:03:25.960Z" level=info msg="Returning from successful wait for resource namespace./kubeflow in namespace "

Note the selfLink api/v1/namespaces/kubeflow, which is now correct.

[Kyle-Wong]

@terrytangyuan I reran CI checks and they are all passing, can you merge this?