GH: Some Object components do not support 3rd party GH_Goo<Base> classes

[AlanRynne]

From the server: https://speckle.community/t/custom-speckle-object-integrating-with-existing-speckle-gh-components/5849/3

Still need to gather some more details here, but the user has identified a miss-alignment with how some object components process the input inside SolveInstance.

All objects should accept any input type, and attempt to:

• Check if the inner value is Base
• Check if the inner value could be converted by the selected converter.
• Return an error if not.

This doesn't seem to be fully the case in the K/V components.