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/cppeditor/cpprefactoringengine.h

@@ -38,6 +38,7 @@ public:
     void startLocalRenaming(const CppTools::CursorInEditor &data,
                             CppTools::ProjectPart *projectPart,
                             RenameCallback &&renameSymbolsCallback) override;
+    void startGlobalRenaming(const CppTools::CursorInEditor &data) override;
 
     bool isUsable() const override { return true; }
 };