[8.15] Endpoint data volume reduction mechanisms [ESS] (backport #5881) (backport #6414)

[mergify]

Backports #5881 to 8.x.

Replaces #6410, which has been closed due to cla-checker-service failure.

Preview: Configure data volume

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This is an automatic backport of pull request #6414 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of fcf2d4b has failed:

On branch mergify/bp/8.15/pr-6414
Your branch is up to date with 'origin/8.15'.

You are currently cherry-picking commit fcf2d4bc.
  (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/getting-started/configure-integration-policy.asciidoc

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   docs/getting-started/endpoint-data-volume.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

[github-actions]

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