Posture check: AWS RDS instance with Multi-Availability Zone disabled
Query: ```config from cloud.resource where cloud.type = 'aws' AND api.name = 'aws-rds-describe-db-instances' AND json.rule = dbinstanceStatus equals available and (engine does not contain aurora and engine does not contain sqlserver and engine does not contain docdb) and (multiAZ is false or multiAZ does not exist)```