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

[github-actions]

This issue was automatically closed because of stale in 10 days

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.