[7.17](backport #32762) Add codeowners for S3, CloudWatch, and Lumberjack.

[mergify]

This is an automatic backport of pull request #32762 done by Mergify.

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[elasticmachine]

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• Start Time: 2022-08-23T14:21:46.982+0000

• Duration: 13 min 35 sec

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