[Py OV] Change simplefilter to filterwarnings in ov.runtime (#28905)

### Details:
 - *item1*
- previous warning: ![Screenshot 2025-01-10
114701](https://github.com/user-attachments/assets/0a027a16-350f-491c-8c70-a71f146348f1)


 - current warning: 

![warn-feb10-interactive](https://github.com/user-attachments/assets/d8c4821d-0b9a-4062-8598-aad8320ddede)
### Tickets:
 - *ticket-id*

Signed-off-by: Alicja Miloszewska <[email protected]>

src/bindings/python/src/openvino/runtime/__init__.py

@@ -6,12 +6,12 @@
 # noqa: F401
 
 import warnings
-warnings.simplefilter("always", DeprecationWarning)
+warnings.filterwarnings("once", category=DeprecationWarning, module="openvino.runtime")
 warnings.warn(
     "The `openvino.runtime` module is deprecated and will be removed in the 2026.0 release. "
     "Please replace `openvino.runtime` with `openvino`.",
     DeprecationWarning,
-    stacklevel=2
+    stacklevel=1
 )