Make VariantReporting::Command::CreateReport use Genome::Process

This breaks the Trio wrapper, which needs some more refactoring before it can have Genome::Process integration.
They would have different workflows associated with them, and the workflow service (currently oracle, but soon PTero) will contain a record of all the workflow inputs.  Having them also in postgres would be duplication.  I guess, that the same could be said for the workflow.xml and inputs.json that gets stored in the metadata directory, but those are just convenient, and not queryable.