patch 9.0.0436: CI: running tests in parallel causes flakiness

Problem:    CI: running tests in parallel causes flakiness.
Solution:   Reorganize the MS-Windows runs. (Ken Takata, closes #11101)
diff --git a/src/gui_w32.c b/src/gui_w32.c
index 8ae0cd0..203b8fa 100644
--- a/src/gui_w32.c
+++ b/src/gui_w32.c
@@ -198,9 +198,7 @@
 # ifndef __MINGW32__
 #  include <shellapi.h>
 # endif
-# if defined(FEAT_TOOLBAR) || defined(FEAT_BEVAL_GUI) || defined(FEAT_GUI_TABLINE)
-#  include <commctrl.h>
-# endif
+# include <commctrl.h>
 # include <windowsx.h>
 
 #endif // PROTO