Support for us-gov-west-1 region

**Community Note**
* Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request
* Please do not leave "+1" or "me too" comments, they generate extra noise for issue followers and do * not help prioritize the request
If you are interested in working on this issue or have submitted a pull request, please leave a comment

**Tell us about your request**

Make the service available in us-gov-west-1 to address the most stringent U.S. government security and compliance requirements.

**Describe alternatives you've considered**
Using other services to serve the use case, for example https://serverlessland.com/patterns/apigw-fargate-cdk

**Additional context**
Anything else we should know?

**Attachments**
If you think you might have additional information that you'd like to include via an attachment, please do - we'll take a look. (Remember to remove any personally-identifiable information.)