feat: Add support for other AWS partitions (cn, us-gov, etc.)

[LeonLuttenberger]

Describe your changes

Adding support for other AWS partitions, such as aws-cn and aws-us-gov.

Checklist before requesting a review

• I updated CHANGELOG.MD with a description of my changes
• If the change was to a module, I ran the code validation script (scripts/validate.sh)
• If the change was to a module, I have added thorough tests
• If the change was to a module, I have added/updated the module's README.md
• If a module was added, I added a reference to the module to the repository's README.md
• I verified that my code deploys successfully using seedfarmer apply

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[kukushking]

Thanks!