Fix build with pybind11 3.x (Fedora rawhide / fedora > 44)

pybind11 3.x added a static_assert that forbids py::call_guard<> on the
def_property / def_property_readonly family:

    error: static assertion failed: def_property family does not currently
    support call_guard. Use a py::cpp_function instead.

Convert the two affected read-only properties to wrap their getter in a
py::cpp_function that releases the GIL internally, preserving the original
"GIL is released while running this function" behaviour. Regular cls.def()
calls keep using py::call_guard<> and are intentionally left unchanged.

--- a/src/bindings/python/src/pyopenvino/core/core.cpp
+++ b/src/bindings/python/src/pyopenvino/core/core.cpp
@@ -769,8 +769,10 @@ void regclass_Core(py::module m) {
             )");
 
     cls.def_property_readonly("available_devices",
-                              &ov::Core::get_available_devices,
-                              py::call_guard<py::gil_scoped_release>(),
+                              py::cpp_function([](ov::Core& self) {
+                                  py::gil_scoped_release release;
+                                  return self.get_available_devices();
+                              }),
                               R"(
                                     Returns devices available for inference Core objects goes over all registered plugins.
 
--- a/src/bindings/python/src/pyopenvino/core/infer_request.cpp
+++ b/src/bindings/python/src/pyopenvino/core/infer_request.cpp
@@ -819,10 +819,10 @@ void regclass_InferRequest(py::module m) {
 
     cls.def_property_readonly(
         "profiling_info",
-        [](InferRequestWrapper& self) {
+        py::cpp_function([](InferRequestWrapper& self) {
+            py::gil_scoped_release release;
             return self.m_request.get_profiling_info();
-        },
-        py::call_guard<py::gil_scoped_release>(),
+        }),
         R"(
             Performance is measured per layer to get feedback on the most time-consuming operation.
             Not all plugins provide meaningful data!