Deprecated `openvino.runtime` imports cause DeprecationWarning in two demos

[Rishabh-Sahni-0809]

Affected files:

• ai_ref_kits/conversational_ai_chatbot/convert_and_optimize_chat.py (lines 6-7)
• demos/virtual_ai_assistant_demo/main.py (lines 26-27)

Environment:

• OpenVINO: 2025.x / 2026.0
• Python: 3.9–3.12
• OS: All

Problem:
Both files use bare openvino.runtime imports with no fallback:

from openvino.runtime import opset10 as ops
from openvino.runtime import passes

The openvino.runtime namespace was deprecated in OpenVINO 2025.2 and is
scheduled for removal in 2026.0. Unlike utils/notebook_utils.py which
wraps these in a try/except for backward compatibility, these files use
bare imports that will raise an ImportError on 2026.0 and currently
emit DeprecationWarning on 2025.x on every execution.

Expected behavior:
No deprecation warnings. Forward compatibility with 2026.0.

Proposed fix:

import openvino.opset10 as ops
from openvino import passes

I'm a GSoC 2026 applicant and would like to submit a fix for this.

[Rishabh-Sahni-0809]

.take