[ECR] CloudFormation for CRR and SRR

[rnzsgh]

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Tell us about your request
CloudFormation support for both cross-region and same-region replication (i.e., between accounts) repositories.

Which service(s) is this request for?
ECR

Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard?
The ability to fully automate multi-region architectures or disaster recovery environments using CloudFormation.

Are you currently working around this issue?
Clicks in the AWS Console, CLI or a CFN Custom Resource

Additional context
NA

Attachments
NA

[apurvmahajan]

ReplicationConfiguration and RegistryPolicy resources are now added to CloudFormation for ECR (Private) Cross Region Replication:
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/AWS_ECR.html