🌱 add test for "Enabled Aggregate API for Virtual Cluster"

[Abirdcfly]

What this PR does / why we need it: Add test for #167 Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes #

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[k8s-ci-robot]

Hi @Abirdcfly. Thanks for your PR.

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[Abirdcfly]

The other thing is that our demo does not work (some issue like #198) because of #167. Maybe we need to update the docker image in or update the demo documentation to prompt users to build the latest image themselves

[Abirdcfly]

/assign @fei-guo

[christopherhein]

/ok-to-test

[christopherhein]

/lgtm /approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Abirdcfly, christopherhein

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Needs approval from an approver in each of these files: - ~~[virtualcluster/OWNERS](https://github.com/kubernetes-sigs/cluster-api-provider-nested/blob/main/virtualcluster/OWNERS)~~ [christopherhein] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment