Fix shared_memory issue with cast (#2834)

### Changes

- Fixed shared memory warnings issue.
- Reverted cast for data type while creating constant.

### Reason for changes

- Leftover from #2307.
- Bugfix.

### Related tickets

- 147255

### Tests

- N/A

nncf/openvino/graph/model_transformer.py

@@ -67,6 +67,11 @@ def __init__(self, model: TModel, inplace: bool = False):
             (OVExtractIfBodyCommand, self._apply_extract_if_body_transformation),
         ]
 
+    @staticmethod
+    def _convert_to_dtype(value, dtype):
+        clip_data = np.clip(value, np.finfo(dtype).min, np.finfo(dtype).max)
+        return clip_data.astype(dtype)
+
     @staticmethod
     def _get_name_to_node_mapping(model: ov.Model) -> Dict[str, ov.Node]:
         """
@@ -269,16 +274,22 @@ def _apply_convert_insertion_transformations(
         return model
 
     @staticmethod
-    def _create_constant(value: np.ndarray, dtype: ov.Type, name: str) -> ov.Node:
+    def _create_constant(value: np.ndarray, dtype: ov.Type, name: str, shared_memory: bool = False) -> ov.Node:
         """
         Creates constant using opset.
 
         :param value: Numpy value.
         :param type: Constant type.
         :param name: Name for the constant.
+        :param shared_memory: Shared memory option.
         :return: ov.Node instance.
         """
-        return opset.constant(value, dtype=dtype, name=name)
+        constant_value = value
+        # BF16 does not support type conversion in numpy
+        if dtype != ov.Type.bf16 and constant_value.dtype != dtype.to_dtype():
+            constant_value = OVModelTransformer._convert_to_dtype(constant_value, dtype.to_dtype())
+
+        return opset.constant(constant_value, dtype=dtype, name=name, shared_memory=shared_memory)
 
     @staticmethod
     def _create_fake_quantize(
@@ -511,7 +522,7 @@ def _set_const_value(node_with_const: ov.Node, const_port_id: int, const_value:
             # Shared memory does not work for BF16 precision
             shared_memory = False
 
-        new_const_node = opset.constant(
+        new_const_node = OVModelTransformer._create_constant(
             const_value,
             dtype=const_port.get_element_type(),
             name=const_node.get_friendly_name(),