[8.17] Retroactively updates known issues for Defend and Security (backport #6813)

[mergify]

Fixes elastic/docs-content#1334 and adds resolution information to other bugs that were fixed.

Previews:

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

  ---

  This is an automatic backport of pull request Retroactively updates known issues for Defend and Security #6813 done by Mergify.

[mergify]

Cherry-pick of f4efddc has failed:

On branch mergify/bp/8.17/pr-6813
Your branch is up to date with 'origin/8.17'.

You are currently cherry-picking commit f4efddce.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   docs/release-notes/8.16.asciidoc
	modified:   docs/release-notes/8.17.asciidoc

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   docs/release-notes/8.18.asciidoc

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[github-actions]

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