Enhanced the existing curated detections for AWS rule sets in the Cloud Threats category to add 40 new detections

## Feature Enhanced the existing [curated detections for AWS rule sets](https://cloud.google.com/chronicle/docs/detection/cloud-threats-category#aws-rule-sets) in the Cloud Threats category to add 40 new detections. These new rules, added to existing rule sets, expand the coverage and are designed to identify tactics and techniques commonly employed by malicious actors that use popular open source offensive security tools against AWS resources.