gadget_project_advice needs the prognosis file updates for ling and tusk

[willbutler42]

[bthe]

Currently the gadget_project_* do not support the undocumented prognosis likelihood function, which unlike the name suggests, is a function that calculates next years catch and distributes the catch to different fleets according to a user defined proportion. I've started working on supporting this in Rgadget (see https://github.com/gadget-framework/rgadget/blob/master/R/gadget_forward.R#L467 and this commit eb7abc0) but we need to a) build tests for this function and b) apply to tusk and ling.