Add alerter for IRIS IRP system

[malinkinsa]

Description

Added a new alerter type for the ability to create alerts and cases in the IRIS IRP system.

Checklist

• [x] I have reviewed the contributing guidelines.
• [x] I have included unit tests for my changes or additions.
• [x] I have successfully run make test-docker with my changes.
• [x] I have manually tested all relevant modes of the change in this PR.
• [x] I have updated the documentation.
• [x] I have updated the changelog.

[jertel]

The reason the automation failed is due to the linter finding some white space violations in your new code/tests.

[malinkinsa]

I see a problem in the tests, so I'm taking a look. UDP: Fixed

[malinkinsa]

The reason the automation failed is due to the linter finding some white space violations in your new code/tests.

Fixed