Golang cmd/compile: unnecessary internal variables are exported to DWARF for range-over-func loops

The compiler exports to DWARF a variety of internal variables (#state, #next, parameters) for range-over-func loops that exist to facilitate the implementation of range-over-func but have no value for users. These should probably not be exported.

Comment From: gopherbot

Change https://go.dev/cl/594257 mentions this issue: cmd/compile: drop internal range-over-func vars from DWARF output