[8.x] New option to install and enable rules in one step (backport #6051)

[mergify]

Resolves #5954.

Previews

• Stateful docs: Install and manage Elastic prebuilt rules
• Serverless docs: Install and manage Elastic prebuilt rules

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  This is an automatic backport of pull request New option to install and enable rules in one step #6051 done by Mergify.

[mergify]

Cherry-pick of ea279e9 has failed:

On branch mergify/bp/8.x/pr-6051
Your branch is up to date with 'origin/8.x'.

You are currently cherry-picking commit ea279e96.
  (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:
	new file:   docs/detections/images/boxesVertical.svg
	modified:   docs/detections/images/prebuilt-rules-add.png
	modified:   docs/detections/prebuilt-rules-management.asciidoc

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   docs/serverless/images/prebuilt-rules-management/-detections-prebuilt-rules-add.png
	deleted by us:   docs/serverless/rules/prebuilt-rules/prebuilt-rules-management.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

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