List recovery groups

The following is an example of a request to list the recovery groups in an account, and the response.

aws route53-recovery-readiness --region us-west-2 list-recovery-groups

{
    "RecoveryGroups": [
        {
            "Cells": [
                "arn:aws:route53-recovery-readiness::888888888888:cell/test-cell",
                "arn:aws:route53-recovery-readiness::888888888888:cell/test-cell-2"
            ],
            "RecoveryGroupArn": "arn:aws:route53-recovery-readiness::888888888888:recovery-group/test-recovery-group",
            "RecoveryGroupName": "test-recovery-group",
            "Tags": {}
        }
    ]
}