CppEditor: add startGlobalRenaming

Existing built-in functionality is moved there.
Clang part is to be implemented later

Change-Id: I7595898495213c087243cd534b4ba1617b4c27e9
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/cpptools/refactoringengineinterface.h

@@ -54,6 +54,7 @@ public:
     virtual void startLocalRenaming(const CursorInEditor &data,
                                     CppTools::ProjectPart *projectPart,
                                     RenameCallback &&renameSymbolsCallback) = 0;
+    virtual void startGlobalRenaming(const CursorInEditor &data) = 0;
 
     virtual bool isUsable() const = 0;
 };