accountIdproperty and the name of the IAM role in the
deploymentRoleproperty to set the IAM role Takomo should use to deploy its configurations. The value for the
deploymentRoleproperty is complete IAM role ARN which also includes the target account id.
deploymentRoleNameproperty defined by the all/application deployment group. Each target then specifies the
accountIdproperty, which Takomo combines with the
deploymentRoleNameproperty to form the complete ARN for the deployment role.