Restructuring the troubleshooting OADP section

[apurvabhide17]

Version(s):
OCP 4.14 - 4.18

Issue:
OADP-4561
Link to docs preview:

QE review:

• QE has approved this change.

Additional information:
Restructuring Troubleshooting assembly

[apurvabhide17]

/label OADP

[ocpdocs-previewbot]

🤖 Fri Jan 17 19:27:11 - Prow CI generated the docs preview:

https://87229--ocpdocs-pr.netlify.app/
https://87229--ocpdocs-pr.netlify.app/openshift-enterprise/latest/backup_and_restore/application_backup_and_restore/troubleshooting.html
https://87229--ocpdocs-pr.netlify.app/openshift-enterprise/latest/migrating_from_ocp_3_to_4/troubleshooting-3-4.html
https://87229--ocpdocs-pr.netlify.app/openshift-enterprise/latest/migration_toolkit_for_containers/troubleshooting-mtc.html

[openshift-ci]

@apurvabhide17: The following tests 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-asciidoc	85e9c6b	link	true	/test validate-asciidoc
ci/prow/validate-portal	85e9c6b	link	true	/test validate-portal

Full PR test history. Your PR dashboard.

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[openshift-bot]

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Mark the issue as fresh by commenting /remove-lifecycle stale.
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Exclude this issue from closing by commenting /lifecycle frozen.

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/lifecycle stale

[openshift-merge-robot]

PR needs rebase.

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