Fixed C++ RTTI for ConversionExtensionBase (#28758)

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Author: ilya-lavrenov

src/frontends/common/include/openvino/frontend/extension/conversion.hpp

@@ -20,7 +20,7 @@ class FRONTEND_API ConversionExtensionBase : public ov::Extension {
         return m_op_type;
     }
 
-    ~ConversionExtensionBase() override = default;
+    ~ConversionExtensionBase() override;
 
 private:
     std::string m_op_type;

src/frontends/common/src/extension/conversion.cpp

@@ -6,4 +6,6 @@
 
 using namespace ov::frontend;
 
+ConversionExtensionBase::~ConversionExtensionBase() = default;
+
 ConversionExtension::~ConversionExtension() = default;