Applying 4.17 updates to IBM Z content

[lahinson]

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Version(s): 4.17 only

Issue: No issue - related to https://github.com/openshift/openshift-docs/pull/84044

Link to docs preview:

QE review:

• [x] QE has approved this change.

Additional information: The content in this PR was reviewed and approved in https://github.com/openshift/openshift-docs/pull/84028. This content needs to be merged for the next HCP release on or after Oct. 31.

[ocpdocs-previewbot]

🤖 Wed Nov 06 19:40:29 - Prow CI generated the docs preview:

https://84046--ocpdocs-pr.netlify.app/openshift-enterprise/latest/disconnected/mirroring/installing-mirroring-disconnected.html https://84046--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-deploy/hcp-deploy-ibmz.html https://84046--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-destroy/hcp-destroy-ibmz.html https://84046--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-disconnected/disconnected-install-ibmz-hcp.html https://84046--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-manage/hcp-manage-bm.html https://84046--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-manage/hcp-manage-non-bm.html https://84046--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/index.html

[openshift-ci[bot]]

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