Provide MenuSequenceCA converter that does not call generator function

Addressing @fwinkl's request to separate generic functionality from where it is used (I know the request was for a separate commit, but I think the application will take a while yet to be validated, and this might be useful elsewhere).

Splits the menuSequenceCAToGlobalWrapper function into an append function and the wrapper which calls the generator and then appends. Jet config functions tend to return the MenuSequence(CA) in a tuple with other info, so that case can be more neatly handled by a standalone append.

If this is too late and needs to be redirected to 23.0, I will do so when MRs to that branch are opened.