[18.0-fr1] Remove DS tigger PoC content

[openshift-cherrypick-robot]

This is an automated cherry-pick of #2703

/assign pablintino

[softwarefactory-project-zuul]

Zuul encountered a syntax error while parsing its
configuration in the repo openstack-k8s-operators/ci-framework on branch 18.0-fr1. The
problem was:

Nodeset centos-9-multinode-rhel-9-2-crc-extracted-2-39-0-3xl-novacells does not match existing definition in branch main

The problem appears in the the "centos-9-multinode-rhel-9-2-crc-extracted-2-39-0-3xl-novacells" nodeset stanza:

nodeset:
name: centos-9-multinode-rhel-9-2-crc-extracted-2-39-0-3xl-novacells
nodes:
- name: controller
label: cloud-centos-9-stream-tripleo
- name: crc
label: coreos-crc-extracted-2-39-0-3xl
- name: undercloud
label: cloud-rhel-9-2-tripleo
...

in "openstack-k8s-operators/ci-framework/zuul.d/[email protected]", line 150

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[softwarefactory-project-zuul]

Zuul encountered a syntax error while parsing its
configuration in the repo openstack-k8s-operators/architecture on branch main. The
problem was:

Job downstream-va-hci-trigger-job not defined

The problem appears in the the "architecture-downstream-va-hci-trigger-job" job stanza:

job:
name: architecture-downstream-va-hci-trigger-job
parent: downstream-va-hci-trigger-job
description: |
This job will trigger a VA HCI job downstream.
We can invoke this job by adding following comment
\trigger github-experimental in the github pull request comment.
These jobs runs in github-experimental-trigger pipeline.
files:
...

in "openstack-k8s-operators/architecture/zuul.d/trigger-jobs.yaml@main", line 1

[softwarefactory-project-zuul]

Zuul encountered a syntax error while parsing its
configuration in the repo openstack-k8s-operators/architecture on branch main. The
problem was:

Job downstream-va-hci-trigger-job not defined

The problem appears in the the "architecture-downstream-va-hci-trigger-job" job stanza:

job:
name: architecture-downstream-va-hci-trigger-job
parent: downstream-va-hci-trigger-job
description: |
This job will trigger a VA HCI job downstream.
We can invoke this job by adding following comment
\trigger github-experimental in the github pull request comment.
These jobs runs in github-experimental-trigger pipeline.
files:
...

in "openstack-k8s-operators/architecture/zuul.d/trigger-jobs.yaml@main", line 1

[pablintino]

I need to cleanup the architecture repo.