Extract opptional "GenerateSampleInsight" insights method from insights to files used by development builds only
Currently many insights implement an optional GenerateSampleInsight
method in case they are able to generate sample insights during dev builds, to help us to see and interact with them during development without generate them by the usual way (that can take many hours in some cases).
Those methods should be moved to separated files that use the // +build dev !release
, meaning that they are present only on dev builds, never in production, as generating such sample insights is not desired by our users.