[OpenVINO backend] add __array__ method for OpenVINOKerasTenor by raising and error

Author: Mohamed-Ashraf273

keras/src/backend/openvino/core.py

@@ -479,6 +479,13 @@ def __mod__(self, other):
         )
         return OpenVINOKerasTensor(ov_opset.mod(first, other).output(0))
 
+    def __array__(self):
+        raise ValueError(
+            "A OpenVINOKerasTensor is symbolic: it's a placeholder for a shape "
+            "an a dtype. It doesn't have any actual numerical value. "
+            "You cannot convert it to a NumPy array."
+        )
+
 
 def ov_to_keras_type(ov_type):
     for _keras_type, _ov_type in OPENVINO_DTYPES.items():