stdout example.com/c

# go.work on disk and in overlay.
go list -overlay=overlay.json -m
stdout example.com/a
stdout example.com/b
! stdout example.com/c

-- overlay.json --
{"Replace": {"go.work": "overlaywork"}}
-- overlaywork --
use (
    ./a
    ./b
)
-- go.work.non-overlay --
use (
    ./a
    ./b
    ./c
)
-- a/go.mod --
module example.com/a
-- b/go.mod --
module example.com/b
-- c/go.mod --