Is this feature request related to a new rule or cfn-lint capabilities?

New capability

Describe the feature you'd like to request

cfn-lint doesn't recognize the ARNs for govcloud items as valid.

[cfn-lint] W1031: {'Fn::Sub': 'arn:aws-us-gov:iam::${AWS::AccountId}/managed-by-org/test-policy'} does not match 'arn:(aws[a-zA-Z-]*)?:iam::(\d{12}|aws):policy/[a-zA-Z_0-9+=,.@\-_/]+' when 'Fn::Sub' is resolved

Describe the solution you'd like

Allow cfn-lint to be aware of GovCloud ARNS.

Additional context

No response

Is this something that you'd be interested in working on?

• 👋 I may be able to implement this feature request

Would this feature include a breaking change?

• ⚠️ This feature might incur a breaking change