update ov runtime and bump demos reqs

[dtrawins]

🛠 Summary

Update OV Runtime

🧪 Checklist

• Unit tests added.
• The documentation updated.
• Change follows security best practices.
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[Copilot]

Pull request overview

This PR updates OpenVINO / GenAI source pins and nightly package URLs, and adjusts Python demo dependency requirements to align with the updated runtime stack.

Changes:

• Bump OpenVINO / Tokenizers / GenAI source commit SHAs and nightly GenAI package URLs in versions.mk.
• Update the CLIP image classification demo client requirements by removing the NumPy <2 cap.
• Update the CLIP model download/conversion requirements by relaxing pins for transformers and torch.
• Bump optimum-intel commit and OpenVINO nightly wheel versions used by the demo export tooling.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
versions.mk	Updates OV/Tokenizers/GenAI commit pins and nightly package URLs to a newer build.
demos/python_demos/clip_image_classification/requirements.txt	Removes the NumPy <2 constraint for the demo client environment.
demos/python_demos/clip_image_classification/download_model_requirements.txt	Relaxes dependency constraints for model download/conversion (transformers/torch).
demos/common/export_models/requirements.txt	Updates export tool dependencies (optimum-intel commit, OpenVINO nightly wheel versions).