[RELEASE ONLY] Use release torchao version for OpenVINO

[GregoryComer]

Summary

OpenVINO CI is failing on the release branch. We can avoid the build from source by just using the release ao version installed with pyproject.toml.

Test Plan

The test-openvino-linux / linux-job run is passing on this PR (failing on trunk).

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15880

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 1 New Failure, 3 Cancelled Jobs, 1 Unrelated Failure

As of commit 84a2a80 with merge base e0dda90 ():

NEW FAILURE - The following job has failed:

• pull / test-moshi-linux / linux-job (gh)
  RuntimeError: Command docker exec -t a55d39d2ad29a7c80da4213336bc476745230dd58ae7217dd1fe99d902729914 /exec failed with exit code 1

CANCELLED JOBS - The following jobs were cancelled. Please retry:

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

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

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[GregoryComer]

Note that the install_executorch.sh --minimal call above installs torchao==0.14.

[GregoryComer]

Moshi failure is pre-existing (fixing in #15879).