Perimeter Module supported service and ingress/egress updates

Breaking Changes

• update vpc_sc_supported_services to be up to date with the current services listed from gcloud beta access-context-manager supported-services list, see commit for changes

Changes

• adds outputs for some of the local variables in the service_perimeter_regular module for debugging purposes
• Removes uneccessary try for checking if file exists (the variable defaults to the second value in the try block so it is uneccessary)
• Adds more unit tests to cover the existance/nonexistance of both ingress and egress policies

Fixes

• changes the format of ingress_policies and egress_policies local variables from a list to a map (with the index as the key) as for_each expects objects or sets.