[ET-VK] Introduce specialized implementation for per-row reduction

[SS-JIA]

Stack from ghstack (oldest at bottom):

• -> [ET-VK] Introduce specialized implementation for per-row reduction #15161
• [ET-VK] Contiguous buffer implementation for embedding #15160
• [ET-VK] Implementation of pow.Tensor_Scalar #15159
• [ET-VK][ez] Introduce a graph config setting to force resize functions to execute #15158
• [ET-VK] Introduce TextureMetadata struct #15157
• [ET-VK][ez] Allow bool tensors to be lowered to ET-VK and add uint8(bool) dtype variants for several compute shaders #15155
• [ET-VK][ez] Make pipeline executable properties be controlled by a different macro #15154
• [ET-VK][ez] Accept sample_kwargs as an argument in several test util functions #15153

Title says it all!

This diff also adds support for argmin and argmax, but only for per-row reduction.

Differential Revision: D84716454

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15161

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❌ 2 New Failures, 1 Cancelled Job, 2 Unrelated Failures

As of commit 1ac9f30 with merge base 7349bb5 ():

NEW FAILURES - The following jobs have failed:

• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh)
  RuntimeError: Command docker exec -t 2abac88dced3e739df6603f9e14b4cf2bb0cde96dba0eb7e5ba23429d5a504d7 /exec failed with exit code 1
• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t ace8fabf14e4a6adeac25af2efface5ca8dd4b190c76fb205a03d19c4a2ec88a /exec failed with exit code 1

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

• Test CoreML Backend / test-coreml / test-backend-macos (coreml_static_int8, operators) / macos-job (gh)
  ##[error]The operation was canceled.

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

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

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

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

• pull / unittest / linux / linux-job (gh) (trunk failure)

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