### Issue # (if applicable) Closes #29918. ### Reason for this change It would be useful if we could call AWS API across regions from a Step Functions state machine. Currently it is not officially supported even with AWS SDK integration tasks. Our usecase is to automate a cross-region failover scenario in a multi-region application. This requires you to orchestrate multiple API calls for both active and standby regions (e.g. failover Aurora DB cluster, rewrite AppConfig parameter, etc), and it would be great if we can manage these operations in a single state machine. ### Description of changes This PR adds a new construct `CallAwsServiceCrossRegion` that deploys 1. a Lambda function to call AWS API in different regions 2. SFn task to call the function. Because most properties are compatible with the existing `CallAwsService` construct, you can use the new construct by just adding the `region` property. Additionally, it also allows to set `endpoint` to override AWS API endpoint, because some AWS APIs requires you to override it. (e.g. [Route53 ARC](https://docs.aws.amazon.com/r53recovery/latest/dg/getting-started-cli-routing.control-state.html)) ### Description of how you validated changes Added unit tests and integ tests. ### Checklist - [X] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md) ---- *By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*