[Draft] Add worker node to run test operator on uni04delta

[gmarcian]

In order to run disruptive tests on the uni04delta env, We need to have a worker node dedicated for the test operator.
Thus we can ensure that test pods won't be affected by the failures.

• Running disruptive tests is part of HA testing of the system. Please see OSPRH-7602

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: gmarcian
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[openshift-ci]

Hi @gmarcian. Thanks for your PR.

I'm waiting for a openstack-k8s-operators member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/605f01ec091f444fb44e5598bc3cf611

✔️ noop SUCCESS in 0s
✔️ rhoso-architecture-validate-uni04delta SUCCESS in 5m 02s
❌ rhoso-architecture-validate-uni04delta-ipv6 FAILURE in 4m 04s

[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/77b345f8b27c4b94894fb0ec2736c3a9

✔️ noop SUCCESS in 0s
✔️ rhoso-architecture-validate-uni04delta SUCCESS in 3m 45s
❌ rhoso-architecture-validate-uni04delta-ipv6 FAILURE in 4m 17s