Moves longstanding known issues for manual runs to docs

[nastasha-solomon]

Description

Removes longstanding known issues that have not been fixed (and are not on the docket to be fixed) from the Security release notes.

Since it's still important for users to know about these bugs, I'll be doc'ing them as "limitations" in the manual run feature docs instead. This change has already been made to the 8.18 docs. The 8.16 and 8.17 docs are being updated via #6800.

Preview:

• 8.17.x release notes
• 8.16.x release notes

[github-actions]

A documentation preview will be available soon.

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[yctercero]

Thanks @nastasha-solomon ! LGTM.

@nkhristinin we should see if we can prioritize fixing some of these for 8.19 after bulk endpoint is done.

[mergify]

This pull request is now in conflicts. Could you fix it @nastasha-solomon? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b remove-manual-rules-kis upstream/remove-manual-rules-kis
git merge upstream/8.x
git push upstream remove-manual-rules-kis

[nastasha-solomon]

Closing this since this branch is no longer viable and the feature docs have already been updated.