Refactor inheritance in armem/core

• Remove common base classes and virtual inheritance
• Move constructors and operators to base classes
• Add tests for copy/move constructors and operators

source/RobotAPI/libraries/armem/core/base/EntityBase.h

@@ -268,33 +268,6 @@ namespace armarx::armem::base
             return "entity";
         }
 
-        virtual _Derived copy() const override
-        {
-            _Derived d;
-            this->_copySelf(d);
-            return d;
-        }
-
-        virtual _Derived copyEmpty() const override
-        {
-            _Derived d;
-            this->_copySelfEmpty(d);
-            return d;
-        }
-
-
-    protected:
-
-        virtual void _copySelf(DerivedT& other) const override
-        {
-            Base::_copySelf(other);
-        }
-
-        virtual void _copySelfEmpty(DerivedT& other) const override
-        {
-            Base::_copySelfEmpty(other);
-        }
-
 
     private: