[8.5](backport #33214) [Metricbeat] Fix index and cluster_stats schemas in the ES module to account for missing fields

[mergify[bot]]

This is an automatic backport of pull request #33214 done by Mergify.

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[elasticmachine]

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• Start Time: 2022-10-13T14:22:20.900+0000

• Duration: 53 min 39 sec

Test stats :test_tube:

Test	Results
Failed	0
Passed	3883
Skipped	884
Total	4767

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[mergify[bot]]

This pull request has not been merged yet. Could you please review and merge it @Kerry350? 🙏

[mergify[bot]]

This pull request is now in conflicts. Could you fix it? 🙏 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/8.5/pr-33214 upstream/mergify/bp/8.5/pr-33214
git merge upstream/8.5
git push upstream mergify/bp/8.5/pr-33214

[Kerry350]

Oops I hadn't noticed this, I assumed it would be an automatic process. Fixing the conflicts.