Add formatter for Security Hub Findings

[kclinden]

Is your request related to a new offering from AWS?

• Yes ✅: please list the AWS provider version which introduced this functionality

Is your request related to a problem? Please describe.

No

Describe the solution you'd like.

This currently provides formatting for Guard Duty findings and we should create a similar capability for Security Hub findings.

Describe alternatives you've considered.

Create my own lambda

Additional context

[github-actions]

This issue has been automatically marked as stale because it has been open 30 days
with no activity. Remove stale label or comment or this issue will be closed in 10 days

[github-actions]

This issue has been automatically marked as stale because it has been open 30 days
with no activity. Remove stale label or comment or this issue will be closed in 10 days