[RHDEVDOCS-6794] Add `opc assist` command

[ochromy]

Version(s):

• pipelines-docs-1.21

Issue:

• https://issues.redhat.com/browse/RHDEVDOCS-6794

Link to docs preview:

• Diagnosing pipeline failures with opc assist
• Lightspeed utility commands

QE review:

• [ ] QE has approved this change.

[ocpdocs-previewbot]

🤖 Wed Dec 17 12:57:17 - Prow CI generated the docs preview: https://103763--ocpdocs-pr.netlify.app Complete list of updated preview URLs: artifacts/updated_preview_urls.txt

[jkhelil]

/approve

[ochromy]

/retest-required

[openshift-ci[bot]]

@ochromy: all tests passed!

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