Add Omitted Rego Evaulation results to the ScubaResults.json

[adhilto]

💡 Summary

When a ScubaGear policy check is omitted via a configuration file the results of the Rego evaluation are not captured within the ScubaResults*.json only within the currently default named TestResults.json.

This enhancement is to add another property to the ScubaResults*.json, called something like
OmittedEvalationResults or OmittedRegoResults to capture this data.

Motivation and context

To capture omission data in our new unified JSON rather having to pivot to either the TestResults.json or recreate the evaluation using the Raw field in ScubaResults.json

Implementation notes

See cisagov/ScubaGear#1458 for the equivalent issue on ScubaGear.

Acceptance criteria

For any policies that are omitted, the Rego eval results are captured somewhere within the ScubaResults*.json