Move wxInfoBar to core library from adv.

This is necessary in order to be able to use it in the print preview (an
upcoming change).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64213 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/infobar.h

@@ -21,7 +21,7 @@
 // wxInfoBar shows non-critical but important information to the user
 // ----------------------------------------------------------------------------
 
-class WXDLLIMPEXP_ADV wxInfoBarBase : public wxControl
+class WXDLLIMPEXP_CORE wxInfoBarBase : public wxControl
 {
 public:
     // real ctors are provided by the derived classes, just notice that unlike