Posture check: Azure Activity log alert for delete policy assignment does not exist
Query: ```config from cloud.resource where cloud.type = 'azure' AND api.name = 'azure-activity-log-alerts' AND json.rule = "location equal ignore case Global and properties.scopes[*] does not contain resourceGroups and properties.enabled equals true and properties.condition.allOf[?(@.field=='operationName')].equals equals Microsoft.Authorization/policyAssignments/delete" as X; count(X) less than 1```