Datadog security

[essa]

This PR adds command and files for enabling Datadog CSW feature to datadog plugin.

The config changes needed is described here.

• https://www.notion.so/Datadog-as-IDS-IPS-and-FIM-109f205717b34e798bf4a69aab58997b
• https://docs.datadoghq.com/security/cloud_security_management/setup/csm_cloud_workload_security/agent/linux/

Background

Barcelona plugin hooks creating cloud-init config file and insert additional commands and files to it.