[8.16](backport #41495) x-pack/filebeat/input/awss3: support for Access Point ARN

[mergify]

Proposed commit message

Added a new option access_point_arn to the AWS S3 input as an alternative to the bucket ARN to access S3 buckets.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Related issues

• Closes [aws]Add support for access point in aws integration #41494

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This is an automatic backport of pull request #41495 done by [Mergify](https://mergify.com).

[pierrehilbert]

@chemamartinez could you please fix the changelog entry?
Please don't merge this yet as the feature freeze for 8.16.1 was yesterday

[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/8.16/pr-41495 upstream/mergify/bp/8.16/pr-41495
git merge upstream/8.16
git push upstream mergify/bp/8.16/pr-41495