[Py OV] Fix export_model() fails Unable to cast Python instance of type <class 'int'> to C++ type 'int' (#30468)

### Details:
- `OutPyStream.seekoff` calls `io.BytesIO.seek()` method which return
type is python's `int`.
In Python3 `int` type can expand to the limit of the available memory.
Error occurs when casting numbers bigger than 2^32-1 to C++'s int which
is 16-bit or 32-bit.
Solution: cast seek() return value to `long long int` which is at least
64-bit.

### Tickets:
 - [CVS-165443](https://jira.devtools.intel.com/browse/CVS-165443)

---------

Signed-off-by: Alicja Miloszewska <alicja.miloszewska@intel.com>

Author: almilosz

src/bindings/python/src/pyopenvino/utils/utils.hpp

@@ -66,7 +66,7 @@ class OutPyBuffer : public std::streambuf {
         if (python_direction == -1) {
             return pos_type(off_type(-1));
         }
-        const auto abs_pos = m_py_stream.attr("seek")(off, python_direction).cast<int>();
+        const auto abs_pos = m_py_stream.attr("seek")(off, python_direction).cast<int64_t>();
         return pos_type(abs_pos);
     }