Single output node "render"

right now if we want to try certain things we need to start mutting or bypassing plenty of nodes even if what we want is to simply check the output of an input node or something like that, that doesn't require "render".

It would be nice to have a way to select any type of "render" node (sorry I don't know if there is another terminology for those) like Save Image, Preview Image, and so, and launch the "render" execution just for that node, not the entire worklfow.

In practice it could create a secondary workflow copying that node and the dependencies of that node and running it as a regular render.