[7.x](backport #28352) [Filebeat] keep track of bytes read when max_bytes exceeded

[mergify]

This is an automatic backport of pull request #28352 done by Mergify.

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[elasticmachine]

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• Start Time: 2021-10-13T13:56:38.492+0000

• Duration: 163 min 35 sec

• Commit: 31f2898

Test stats 🧪

Test	Results
Failed	0
Passed	54340
Skipped	5292
Total	59632

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[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-28352 upstream/mergify/bp/7.x/pr-28352
git merge upstream/7.x
git push upstream mergify/bp/7.x/pr-28352