Use safe_numerics util from PyTorch

[aaron-ang]

Summary

Reopening from #11537
Fixes #11370

Test plan

Use existing tests since we are doing a drop-in replacement for overflow checks.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/12125

• 📄 Preview Python docs built from this PR

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❌ 2 New Failures, 2 Unrelated Failures

As of commit e018cd1 with merge base aab8021 ():

NEW FAILURES - The following jobs have failed:

• pull / test-eval_llama-mmlu-linux / linux-job (gh)
  RuntimeError: Command docker exec -t e51357d99964f9fa0dcf50e7dad8660029452f4fd0211fca51bf023807b0368e /exec failed with exit code 1
• pull / test-llava-runner-linux / linux-job (gh)
  RuntimeError: Command docker exec -t ff4d7ffb8400739c560e373ebd3ab666376b97e1af27b67723d0eefbcbd844e1 /exec failed with exit code 139

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

• pull / unittest / linux / linux-job (gh) (similar failure)
  backends/xnnpack/test/ops/test_to_copy.py::TestChannelsLastTaggedReshapePass::test_quantized_to_copy

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-editable / linux / linux-job (gh) (trunk failure)
  backends/xnnpack/test/ops/test_to_copy.py::TestChannelsLastTaggedReshapePass::test_quantized_to_copy

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[aaron-ang]

@pytorchbot label "release notes: runtime"

[aaron-ang]

hi @JacobSzwejbka, I can't seem to figure out why the import #include <executorch/runtime/core/portable_type/c10/c10/util/safe_numerics.h> is not recognized..

Edit: I've rebased with main and added the file paths to targets.bzl. Hope this fixes the runtime errors.

[swolchok]

looks good as long as tests pass, just approved them to run

[aaron-ang]

@swolchok can you try running the CI again?

[swolchok]

CI looks good, can you rebase and fix the conflict?

[aaron-ang]

@swolchok rebased

[swolchok]

unittest linux failures look ignorable