[OCPBUGS#22683] Remove reference to BM control plane node for OpenStack - 4.12

[maxwelldb]

Manual CP of #71609 for 4.12.

[maxwelldb]

/cherry-pick enterprise-4.14

[openshift-cherrypick-robot]

@maxwelldb: once the present PR merges, I will cherry-pick it on top of enterprise-4.14 in a new PR and assign it to you.

In response to this:

/cherry-pick enterprise-4.14

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[ocpdocs-previewbot]

🤖 Wed Aug 27 13:14:30 - Prow CI generated the docs preview:

https://98091--ocpdocs-pr.netlify.app/
https://98091--ocpdocs-pr.netlify.app/openshift-enterprise/latest/installing/installing_openstack/installing-openstack-installer-custom.html
https://98091--ocpdocs-pr.netlify.app/openshift-enterprise/latest/installing/installing_openstack/installing-openstack-user.html

[openshift-ci]

@maxwelldb: all tests passed!

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[openshift-cherrypick-robot]

@maxwelldb: new pull request created: #98093

In response to this:

/cherry-pick enterprise-4.14

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.