NO-JIRA: docs: fixes, typos and small improvements

[mtulio]

What this PR does / why we need it:

Documentation fixes:

• broken links
• typos
• small improvements in sub-sections
• removing unused doc fragments

Which issue(s) this PR fixes (optional, use fixes #<issue_number>(, fixes #<issue_number>, ...) format, where issue_number might be a GitHub issue, or a Jira story:
Fixes #

Checklist

• Subject and description added to both, commit and PR.
• Relevant issues have been referenced.
• This change includes docs.
• This change includes unit tests.

[Copilot]

Copilot reviewed 8 out of 12 changed files in this pull request and generated 1 comment.

Files not reviewed (4)

• docs/home_opct.apps/index.html: Language not supported
• docs/home_opct.apps/reports/gen-reports.sh: Language not supported
• docs/home_opct.apps/reports/redirect-sample.html: Language not supported
• docs/home_opct.apps/reports/report-sample.txt: Language not supported

[rvanderp3]

/lgtm

[rvanderp3]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rvanderp3

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