Add dataplane docs

[fao89]

https://logserver.rdoproject.org/51/851/d054eec5ab28ee48bb5e4103546d1604a63673ed/github-check/openstack-operator-docs-preview/4fb110a/docs_build/docs_build/openstack/

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fao89, rebtoor

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/openstack-k8s-operators/openstack-operator/blob/main/OWNERS)~~ [fao89,rebtoor] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[fao89]

/test openstack-operator-build-deploy-kuttl

Waiting the cluster to be up
..........................................................................................make: *** [Makefile:2098: ceph] Error 1

[softwarefactory-project-zuul[bot]]

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://review.rdoproject.org/zuul/buildset/7cf2937cb7a54b2a82f574ed12c977ab

:heavy_check_mark: openstack-k8s-operators-content-provider SUCCESS in 2h 00m 20s :heavy_check_mark: podified-multinode-edpm-deployment-crc SUCCESS in 1h 20m 13s :x: cifmw-crc-podified-edpm-baremetal FAILURE in 22m 25s :heavy_check_mark: openstack-operator-tempest-multinode SUCCESS in 1h 38m 20s :heavy_check_mark: openstack-operator-docs-preview SUCCESS in 2m 05s

[fao89]

recheck