OpenVINO Backend Build Updates

[cavusmustafa]

Summary

• OpenVINO build script updates
  • Removed "--minimal" argument for python build to include dependencies for examples.
  • Added "--use-pt-pinned-commit" option to build from pinned PyTorch commit instead of nightly.
  • By default, the script does not build llm dependencies in cpp runtime build. We added additional argument to include llm dependencies.
• Updated cmake files and requirements files accordingly.

Test plan

This PR doesn't include new functionality which requires testing.

cc: @mergennachin @cbilgin @digantdesai @ynimmaga @suryasidd @daniil-lyakhov @anzr299

[pytorch-bot]

🔗 Helpful Links

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❌ 1 New Failure, 1 Cancelled Job, 1 Unrelated Failure

As of commit 1970681 with merge base 913436a ():

NEW FAILURE - The following job has failed:

• Build Presets / apple (profiling) / build (gh)
  The process '/opt/homebrew/bin/git' failed with exit code 128

CANCELLED JOB - The following job was cancelled. Please retry:

• pull / unittest-editable / macos / macos-job (gh)
  ##[error]The operation was canceled.

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

• pull / android / run-emulator (gh) (#16137)
  Timeout waiting for emulator to boot.

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[Copilot]

Pull Request Overview

This PR updates the OpenVINO backend build infrastructure to improve flexibility and fix configuration issues. The changes remove the --minimal flag from Python builds to include example dependencies, introduce a new --cpp_runtime_llm flag for building with LLM support, and update documentation and configuration files accordingly.

• Refactored build script to use conditional LLM dependency inclusion via --cpp_runtime_llm flag
• Updated CMake configuration to use arrays for better argument handling and removed inline OpenVINO backend build in favor of find_package
• Updated documentation and requirements files to reflect new build options and fix parameter references

Reviewed Changes

Copilot reviewed 8 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
backends/openvino/scripts/openvino_build.sh	Refactored build script with new --cpp_runtime_llm flag, removed build_llama_runner function, and restructured CMake argument handling
backends/openvino/README.md	Updated build documentation to reference new --cpp_runtime_llm flag instead of --llama_runner
backends/openvino/requirements.txt	Removed transformers dependency from requirements
examples/openvino/README.md	Added stable_diffusion directory structure to documentation
examples/openvino/llama/README.md	Updated instructions to use new --cpp_runtime_llm flag and provide explicit CMake commands for building llama runner
examples/openvino/stable_diffusion/README.md	Fixed line numbering formatting
examples/openvino/stable_diffusion/requirements.txt	Fixed line numbering formatting
examples/models/yolo12/README.md	Updated documentation to clarify pip install strategy and fix --video_input to --video_path parameter
examples/models/yolo12/requirements.txt	Updated ultralytics version and added opencv-python dependency
examples/models/yolo12/CMakeLists.txt	Changed default OpenVINO backend option to OFF, updated XNNPACK library name, and simplified OpenVINO integration to use find_package

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