[APM] Adds information on excluding data tiers from searches

[colleenmcginnis]

Description

Adds information on excluding data tiers from searches in the APM UI.

I'm not sure if this is better presented as a troubleshooting topic (i.e. reactive) or a best practice (i.e. preventative). For now I've added it as a tip, but we could integrate it into the content on this page if that makes more sense.

Preview link: Cross-cluster search (scroll to the bottom)

Documentation sets edited in this PR

Check all that apply.

• Stateful (docs/en/observability/*)
• Serverless (docs/en/serverless/*)
• Integrations Developer Guide (docs/en/integrations/*)
• None of the above

Related issue

Closes #4311

Checklist

• Product/Engineering Review
• Writer Review

Follow-up tasks

Select one.

• This PR does not need to be ported to another doc set because:
  • The concepts in this PR only apply to one doc set (serverless or stateful)
  • The PR contains edits to both doc sets (serverless and stateful)
• This PR needs to be ported to another doc set:
  • Port to stateful docs: <link to PR or tracking issue>
  • Port to serverless docs: <link to PR or tracking issue>

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[colleenmcginnis]

👋 @crespocarlos @smith can one of you take a look at this PR or suggest someone else who can review?

[crespocarlos]

LGTM.

[colleenmcginnis]

Thanks @crespocarlos. Is this also relevant to serverless?

[crespocarlos]

Thanks @crespocarlos. Is this also relevant to serverless?

Serverless doesn't have the concept of data tiers based on what I've gathered. The option currently is shown on Serverless' Advanced Settings, but I'll raise a PR to remove it from there.

[mergify]

This pull request is now in conflict. Could you fix it @colleenmcginnis? 🙏
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 issue-4311 upstream/issue-4311
git merge upstream/main
git push upstream issue-4311

[dedemorton]

LGTM