[8.6](backport #33559) Add backup to bucket functionality

[mergify]

This is an automatic backport of pull request #33559 done by Mergify.
Cherry-pick of 5df1895 has failed:

On branch mergify/bp/8.6/pr-33559
Your branch is up to date with 'origin/8.6'.

You are currently cherry-picking commit 5df1895443.
  (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:   CHANGELOG.next.asciidoc
	modified:   x-pack/filebeat/_meta/config/filebeat.inputs.reference.xpack.yml.tmpl
	modified:   x-pack/filebeat/docs/inputs/input-aws-s3.asciidoc
	modified:   x-pack/filebeat/filebeat.reference.yml
	modified:   x-pack/filebeat/input/awss3/config.go
	modified:   x-pack/filebeat/input/awss3/config_test.go
	modified:   x-pack/filebeat/input/awss3/input_benchmark_test.go
	modified:   x-pack/filebeat/input/awss3/input_integration_test.go
	modified:   x-pack/filebeat/input/awss3/interfaces.go
	modified:   x-pack/filebeat/input/awss3/mock_interfaces_test.go
	modified:   x-pack/filebeat/input/awss3/s3.go
	modified:   x-pack/filebeat/input/awss3/s3_objects.go
	modified:   x-pack/filebeat/input/awss3/s3_objects_test.go
	modified:   x-pack/filebeat/input/awss3/s3_test.go
	modified:   x-pack/filebeat/input/awss3/sqs_s3_event.go
	modified:   x-pack/filebeat/input/awss3/sqs_s3_event_test.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   x-pack/filebeat/input/awss3/input.go
	both modified:   x-pack/filebeat/input/awss3/metrics.go

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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[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
19 Code Smells

No Coverage information
9.4% Duplication

[elasticmachine]

💚 Build Succeeded

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• Start Time: 2023-03-02T01:24:35.385+0000

• Duration: 129 min 1 sec

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Test	Results
Failed	0
Passed	5062
Skipped	350
Total	5412

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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/8.6/pr-33559 upstream/mergify/bp/8.6/pr-33559
git merge upstream/8.6
git push upstream mergify/bp/8.6/pr-33559

[endorama]

@aspacca I saw that you reviewed the original PR, may you have a look at this backport too?

[aspacca]

@endorama sure thing!