doc: add troubleshooting guide for failure when creating the first ECS Cluster in the account

[konokenj]

https://docs.aws.amazon.com/ja_jp/AmazonECS/latest/developerguide/using-service-linked-roles.html

Resource handler returned message: "Unable to assume the service linked role. Please verify that the ECS service linked role exists. (Service: AmazonECS; Status Code: 400; Error Code: InvalidParameterException; Request ID: 22e06152-22fe-4af1-90e2-937ce3e62c01; Proxy: null)" (RequestToken: 70f29b80-2c90-67be-ab25-097676cebf8c, HandlerErrorCode: InvalidRequest)