update ov build 0820

[dtrawins]

🛠 Summary

🧪 Checklist

• Unit tests added.
• The documentation updated.
• Change follows security best practices.
  ``

[Copilot]

Pull request overview

Updates OpenVINO-related dependency pins and nightly package URLs for the 2026-08-20 builds.

Changes:

• Refreshes OpenVINO, Tokenizers, and GenAI commits.
• Updates Linux and Windows GenAI package URLs.

Suppressed comments (2)

versions.mk:24

• These values now live in versions.mk, but tools/update_ov/update_ov.py still searches Makefile for OV_SOURCE_BRANCH ?= and OV_TOKENIZERS_BRANCH ?=. Those patterns no longer occur in Makefile, so rerunning the repository's dependency-update script will leave these SHAs unchanged and future source builds can silently use stale commits. Please migrate the updater to read and write versions.mk in the same change.

OV_SOURCE_BRANCH ?= 14db3f4a1cd1579747ec65dd0ad6873b44395c6b
OV_TOKENIZERS_BRANCH ?= c478b92dce7889f14a0e4e956fb58428f4e98888
OV_GENAI_BRANCH ?= 7c6f0fa61eb5197ef59d8f6dd1edbc9879b80e92

versions.mk:35

• The package URLs are now centralized here, but tools/update_ov/update_ov.py still writes package links to the old Makefile assignments and the old direct GENAI_PACKAGE_URL assignment in the Windows script. Those targets no longer exist, so future updater runs will not refresh any of these URLs. Please migrate the updater to write these four variables in versions.mk and preserve the Windows fallback behavior.

DLDT_PACKAGE_URL_UBUNTU24 ?= https://storage.openvinotoolkit.org/repositories/openvino_genai/packages/nightly/2026.4.0.0.dev20260820/openvino_genai_ubuntu24_2026.4.0.0.dev20260820_x86_64.tar.gz
DLDT_PACKAGE_URL_UBUNTU22 ?= https://storage.openvinotoolkit.org/repositories/openvino_genai/packages/nightly/2026.4.0.0.dev20260820/openvino_genai_ubuntu22_2026.4.0.0.dev20260820_x86_64.tar.gz
DLDT_PACKAGE_URL_RHEL ?= https://storage.openvinotoolkit.org/repositories/openvino_genai/packages/nightly/2026.4.0.0.dev20260820/openvino_genai_rhel8_2026.4.0.0.dev20260820_x86_64.tar.gz
GENAI_PACKAGE_URL_WINDOWS ?= https://storage.openvinotoolkit.org/repositories/openvino_genai/packages/nightly/2026.4.0.0.dev20260820/openvino_genai_windows_2026.4.0.0.dev20260820_x86_64.zip

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