ci(mge): fix Windows CI

symlink does not work on Windows

GitOrigin-RevId: 45505b8925eebfc528bdfc6cc981ef860712a358

imperative/src/impl/mgb_cg_impl.h

+#include "../../../src/core/impl/graph/cg_impl.h"

imperative/src/impl/mgb_core_impl

-../../../src/core/impl
\ No newline at end of file

imperative/src/impl/opr_utility.cpp

@@ -10,7 +10,7 @@
  */
 
 #include "megbrain/imperative/opr_utility.h"
-#include "./mgb_core_impl/graph/cg_impl.h"
+#include "./mgb_cg_impl.h"
 
 // FIXME; setup_config_cn is copied from src/opr/impl/utility.cpp
 namespace {