Rollup merge of #120865 - saethlin:missing-o-files, r=nnethercote

Turn the "no saved object file in work product" ICE into a translatable fatal error

I don't know if it's fair to say this fixes https://github.com/rust-lang/rust/issues/120854 but it surely makes the error reporting better and should encourage people with good instincts like ```@CinchBlue.```