Managed log source for Sysdig Secure events

[timoguin]

Add support for events forwarded from Sysdig Secure. The policy events are what I'm currently most interested in. For my use case, that will primarily be rule matches for container syscalls.

Reference

• https://docs.sysdig.com/en/docs/sysdig-secure/secure-events/event-forwarding/
• https://docs.sysdig.com/en/docs/sysdig-secure/secure-events/event-forwarding/forwarding-to-webhook/