Type properties use qualified fn instead of just the name

[lue-bird]

Modules don't always expose functions we might expect to apply some simplifications. E.g.

• Array and Graph do not expose a singleton
• Array and many other data structures do not provide sum, product, any or all which could be used in the foldl/r simplifications

Often, these extra helpers are provided by modules in different packages.

Currently, only a function's name is stored in the type properties which has to manually combined with its module name. This PR replaces these function names by qualified names.

[github-actions[bot]]

The branch can be tried out by running:

elm-review --template jfmengels/elm-review-simplify/preview