[8.0](backport #2111) chore: use preconfigured policy for fleet-server's default policy

[mergify]

This is an automatic backport of pull request #2111 done by Mergify.
Cherry-pick of 5ed1aff has failed:

On branch mergify/bp/8.0/pr-2111
Your branch is up to date with 'origin/8.0'.

You are currently cherry-picking commit 5ed1aff.
  (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:   cli/config/compose/profiles/fleet/default/kibana.config.yml
	modified:   cli/config/compose/profiles/fleet/preconfigured-policies/kibana.config.yml
	modified:   internal/kibana/policies.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   e2e/_suites/fleet/fleet.go

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

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[mdelapenya]

@Mergifyio refresh

[mergify]

refresh

✅ Pull request refreshed

[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/8.0/pr-2111 upstream/mergify/bp/8.0/pr-2111
git merge upstream/8.0
git push upstream mergify/bp/8.0/pr-2111

[elasticmachine]

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