Enable the dump-ice-to-disk for msvc

It was only flaky for i686-mingw (windows-gnu), it seemed reasonably
reliable for msvc.

Author: jieyouxu

tests/run-make/dump-ice-to-disk/rmake.rs

@@ -23,7 +23,7 @@
 //! - An attempt is made to re-enable this test on `i686-mingw` (by removing `ignore-windows`). If
 //!   this test is still flakey, please restore the `ignore-windows` directive.
 
-//@ ignore-windows
+//@ ignore-windows-gnu
 //FIXME(#128911): still flakey on i686-mingw.
 
 use std::cell::OnceCell;