OSDOCS#18085: Admonitions to change the auth API separately

[jeana-redhat]

Version(s):
4.12+

Issue:
OSDOCS-18085

Link to docs preview:

• Migrating a Machine API resource to use the Cluster API
• Unexpected resource behavior
• Migrating a Cluster API resource to use the Machine API

QE review:

• QE has approved this change.

Additional information:
DITA compliance fixes included

[ocpdocs-previewbot]

🤖 Thu Jan 29 20:38:49 - Prow CI generated the docs preview:

https://105704--ocpdocs-pr.netlify.app/openshift-enterprise/latest/machine_management/cluster_api_machine_management/cluster-api-disabling.html
https://105704--ocpdocs-pr.netlify.app/openshift-enterprise/latest/machine_management/cluster_api_machine_management/cluster-api-getting-started.html
https://105704--ocpdocs-pr.netlify.app/openshift-enterprise/latest/machine_management/cluster_api_machine_management/cluster-api-troubleshooting.html

[openshift-ci]

@jeana-redhat: all tests passed!

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