TELCODOCS-2125 NIST 800-53 RAN hardening for high security issues 2

[kquinn1204]

[TELCODOCS-2125]: NIST 800-53 RAN hardening for high security issues

Version(s): 4.19 & main

Issue:https://issues.redhat.com/browse/TELCODOCS-2125

Link to docs preview:

• https://90286--ocpdocs-pr.netlify.app/openshift-enterprise/latest/edge_computing/ztp-security-hardening.html
• https://90286--ocpdocs-pr.netlify.app/openshift-enterprise/latest/edge_computing/ztp-reference-cluster-configuration-for-vdu.html#ztp-du-configuring-host-firmware-requirements_sno-configure-for-vdu

QE review:

• [ ] QE has approved this change.

Additional information: