[7.x](backport #27233) Osquerybeat: Add support for input/integration level osquery platform/version/discovery configuration

[mergify]

This is an automatic backport of pull request #27233 done by Mergify.

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[elasticmachine]

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• Start Time: 2021-08-09T14:30:32.861+0000

• Duration: 51 min 39 sec

• Commit: a6e9c37

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Test	Results
Failed	0
Passed	3656
Skipped	0
Total	3656

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Test stats 🧪

Test	Results
Failed	0
Passed	3656
Skipped	0
Total	3656

[mergify]

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/7.x/pr-27233 upstream/mergify/bp/7.x/pr-27233
git merge upstream/7.x
git push upstream mergify/bp/7.x/pr-27233