[ET-VK] Statically quantized add

[SS-JIA]

Stack from ghstack (oldest at bottom):

• -> [ET-VK] Statically quantized add #14649
• [ET-VK] AOT logic for quantized conv2d #14648
• [ET-VK] Statically quantized convolutions #14647

Changes

Title says it all! This diff adds an implementation of binary operators where all tensors are quantized to 8-bit with per-tensor scale and zero point. This is required for many convolution neural networks.

Differential Revision: D83437828

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/14649

• 📄 Preview Python docs built from this PR

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❌ 2 New Failures, 2 Unrelated Failures

As of commit 4a9196e with merge base 049c9fc ():

NEW FAILURES - The following jobs have failed:

• pull / test-llama-lora-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 28eaf976fff904cf09d3fd61185f590a2b8c86e70c5563b0d7cb7b44d682c1df /exec failed with exit code 1
• pull / unittest / macos / macos-job (gh)
  backends/xnnpack/test/recipes/test_xnnpack_recipes.py::TestXnnpackRecipes::test_all_models_with_recipes

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

• pull / test-binary-size-linux-gcc / linux-job (gh) (similar failure)
  ##[error]The operation was canceled.

BROKEN TRUNK - The following job failed but was present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / test-setup-linux-gcc / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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[facebook-github-bot]

@SS-JIA has exported this pull request. If you are a Meta employee, you can view the originating diff in D83437828.

[facebook-github-bot]

@SS-JIA has exported this pull request. If you are a Meta employee, you can view the originating diff in D83437828.