change file-creator-and-type so that it raises exn:fail:filesystem? exceptions instead of exn:fail exceptions for errors having to do with the actual attempt to change/retrieve the creator and type (but leaving alone the type errors)
change file-creator-and-type so that it raises exn:fail:filesystem?
exceptions instead of exn:fail exceptions for errors having to do
with the actual attempt to change/retrieve the creator and type
(but leaving alone the type errors)

closes PR 12400

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket