[Draft] [AWS] Support pulling region from arbitrary domains for aws-s3 input SQS queue url

[strawgate]

Proposed commit message

Draft/test fix for https://github.com/elastic/enhancements/issues/21469

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.

Disruptive User Impact

None

Author's Checklist

• [ ]

How to test this PR locally

filebeat.inputs:
- type: aws-s3
  queue_url: https://sqs.ap-southeast-1.subdomain.domain.com/1234/test-s3-queue
  access_key_id: 'tomato'
  secret_access_key: 'tomato'
  session_token: 'tomato'

Ensure you do not see a region from queue_url parsing errors

Related issues

Relates https://github.com/elastic/enhancements/issues/21469

[botelastic]

This pull request doesn't have a Team:<team> label.

[mergify]

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @strawgate? 🙏.
For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v8./d.0 is the label to automatically backport to the 8./d branch. /d is the digit

[strawgate]

I dont actually think this PR is needed at the moment but drafted it anyway