OSDOCS8193: Created V2 section documentation in disconnected installation mirroring

[subhtk]

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Link to docs preview:

QE review:

• [ ] QE has approved this change.

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[ocpdocs-previewbot]

🤖 Fri May 10 06:10:06 - Prow CI generated the docs preview:

https://75755--ocpdocs-pr.netlify.app/ https://75755--ocpdocs-pr.netlify.app/openshift-enterprise/latest/installing/disconnected_install/index.html https://75755--ocpdocs-pr.netlify.app/openshift-enterprise/latest/installing/disconnected_install/installing-mirroring-creating-registry.html https://75755--ocpdocs-pr.netlify.app/openshift-enterprise/latest/installing/disconnected_install/installing-mirroring-disconnected-v2.html

[openshift-ci[bot]]

@subhtk: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/validate-portal	761559344fcaa50f0a0fd2b038e4c2ce2c05539c	link	true	/test validate-portal

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