Fix build failures

[cymbalrush]

Problem
util::PrepareInputTensors is deprecated and is unavailable when linking to executorch.a. This is causing build failures.

Solution
Remove the util::PrepareInputTensors call and set the method input using a std::vector as the data storage.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/1747

• 📄 Preview Python docs built from this PR

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✅ You can merge normally! (4 Unrelated Failures)

As of commit a594bd6 with merge base 1a58959 ():

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• trunk / test-arm-reference-delegation / linux-job (gh)
  RuntimeError: Command docker exec -t ecac5017cc1b807d8dee98d0ea99713074dd47b29770ee41a266a60f1a56d8f6 /exec failed with exit code 1
• trunk / test-models-macos (cmake, llama2, portable, macos-m1-12) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

BROKEN TRUNK - The following jobs failed but were present on the merge base:

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

• trunk / test-arm-backend-delegation / linux-job (gh)
  /pytorch/executorch/backends/arm/../../../executorch/runtime/core/portable_type/half.h:547:30: error: incomplete type 'std::numeric_limits' used in nested name specifier
• trunk / test-models-macos (cmake, mobilebert, xnnpack-quantization-delegation, macos-m1-12) / macos-job (gh)
  ##[error]The operation was canceled.

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[facebook-github-bot]

@shoumikhin has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[guangy10]

Let's kick off a test-coreml-delegate job on this PR.

[JacobSzwejbka]

can we just use this #1712

extension/runner_util/inputs.cpp

[guangy10]

Verified test-coreml-test is fixed with this PR. Thanks!

[cymbalrush]

extension/runner_util/inputs.cpp

@JacobSzwejbka I couldn't find a build option in the CMake file to include the extension/runner_util directory there are EXECUTORCH_BUILD_EXTENSION_MODULE and EXECUTORCH_BUILD_EXTENSION_DATA_LOADER options but they include different directories.

I can add EXECUTORCH_BUILD_EXTENSION_RUNNER_UTIL option to include extension/runner_util directory but would like to do it in a following PR.

[facebook-github-bot]

@shoumikhin merged this pull request in 7ba9b0d.