[7.x] Add data_streams.wait_for_integration (backport #5928)

[mergify]

This is an automatic backport of pull request #5928 done by Mergify.
Cherry-pick of 114d7d6 has failed:

On branch mergify/bp/7.x/pr-5928
Your branch is up to date with 'origin/7.x'.

You are currently cherry-picking commit 114d7d62.
  (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:   beater/config/config_test.go
	modified:   beater/config/data_streams.go
	modified:   beater/server_test.go
	modified:   docs/configuration-process.asciidoc

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   beater/beater.go
	deleted by us:   changelogs/head.asciidoc

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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• Start Time: 2021-08-12T02:57:27.182+0000

• Duration: 45 min 14 sec

• Commit: 75893e1

Test stats 🧪

Test	Results
Failed	0
Passed	4508
Skipped	15
Total	4523

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[mergify]

This pull request is now in conflicts. 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/7.x/pr-5928 upstream/mergify/bp/7.x/pr-5928
git merge upstream/7.x
git push upstream mergify/bp/7.x/pr-5928

[axw]

@Mergifyio rebase

[mergify]

Command rebase: failure

Base branch update has failed
Git reported the following error:

Rebasing (1/1)

error: could not apply 9110da7... Add data_streams.wait_for_integration (#5928)

Resolve all conflicts manually, mark them as resolved with
"git add/rm <conflicted_files>", then run "git rebase --continue".
You can instead skip this commit: run "git rebase --skip".
To abort and get back to the state before "git rebase", run "git rebase --abort".
Could not apply 9110da7... Add data_streams.wait_for_integration (#5928)
Auto-merging beater/beater.go
CONFLICT (content): Merge conflict in beater/beater.go

err-code: 43FE4