[8.18](backport #4862) Add APM Server known issue for TBS

[mergify]

Description

Add known issue for TBS.

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

Counter part to elastic/apm-server#16393.

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>

---

This is an automatic backport of pull request #4862 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of ed75d36 has failed:

On branch mergify/bp/8.18/pr-4862
Your branch is up to date with 'origin/8.18'.

You are currently cherry-picking commit ed75d36f.
  (fix conflicts and run "git cherry-pick --continue")
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  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   docs/en/observability/apm/known-issues.asciidoc

no changes added to commit (use "git add" and/or "git commit -a")

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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[mergify]

This pull request is now in conflict. Could you fix it @mergify[bot]? 🙏
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 mergify/bp/8.18/pr-4862 upstream/mergify/bp/8.18/pr-4862
git merge upstream/8.18
git push upstream mergify/bp/8.18/pr-4862

[mergify]

This pull request is now in conflict. Could you fix it @mergify[bot]? 🙏
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 mergify/bp/8.18/pr-4862 upstream/mergify/bp/8.18/pr-4862
git merge upstream/8.18
git push upstream mergify/bp/8.18/pr-4862

[mergify]

This pull request is now in conflict. Could you fix it @mergify[bot]? 🙏
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 mergify/bp/8.18/pr-4862 upstream/mergify/bp/8.18/pr-4862
git merge upstream/8.18
git push upstream mergify/bp/8.18/pr-4862

[vishaangelova]

run docs-build