[8.x] [Serverless][8.16] Logs request during preview rule execution (backport #5871)

[mergify]

Fixes #5844 by adding a new section that explains how to use the new Show Elasticsearch requests, ran during rule executions option in the rule preview.

Previews:

• ESS: https://security-docs_bk_5871.docs-preview.app.elstc.co/guide/en/security/master/rules-ui-create.html#view-rule-es-queries
• Serverless: https://elastic-dot-co-docs-production-7pe5v3ygb-elastic-dev.vercel.app/current/serverless/security/rules-create#view-your-rules-es-queries-optional

  ---

  This is an automatic backport of pull request [Serverless][8.16] Logs request during preview rule execution #5871 done by Mergify.

[mergify]

Cherry-pick of 61b4a66 has failed:

On branch mergify/bp/8.x/pr-5871
Your branch is up to date with 'origin/8.x'.

You are currently cherry-picking commit 61b4a663.
  (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/detections/rules-ui-create.asciidoc

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   docs/serverless/rules/rules-ui-create.mdx

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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