Interface groups when creating a NAT port forward rule

[TAG-Epic]

Is your feature request related to existing pfSense functionality that is missing from the API? Please describe.
You can create a NAT port forwarding rule that uses a interface group instead of a regular interface

Is your feature request related to a problem? Please describe.

Describe the solution you'd like
Be able to use a interface group name instead of a interface name

Describe alternatives you've considered
Creating a rule per interface in the group - this is messy.

Additional context