Add checks for compute_slice

[lucylq]

Summary:
Add safety checks to compute_slice, to ensure that we:

1. Do not read outside of the src tensor bounds
2. Do not write outside of the output tensor bounds

Differential Revision: D86433966

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15647

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✅ You can merge normally! (5 Unrelated Failures)

As of commit 188a1b2 with merge base b005f10 ():

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

• pull / test-vulkan-models-linux / linux-job (gh) (matched linux rule in flaky-rules.json)
  The runner has received a shutdown signal. This can happen when the runner service is stopped, or a manually started runner is canceled.

BROKEN TRUNK - The following jobs 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)
  backends/xnnpack/test/recipes/test_xnnpack_recipes.py::TestXnnpackRecipes::test_int8_static_quant_recipe
• pull / unittest / macos / macos-job (gh) (trunk failure)
  backends/xnnpack/test/recipes/test_xnnpack_recipes.py::TestXnnpackRecipes::test_int8_static_quant_recipe
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)
  backends/xnnpack/test/recipes/test_xnnpack_recipes.py::TestXnnpackRecipes::test_int8_static_quant_recipe
• pull / unittest-editable / macos / macos-job (gh) (trunk failure)
  backends/xnnpack/test/recipes/test_xnnpack_recipes.py::TestXnnpackRecipes::test_int8_static_quant_recipe

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[meta-codesync]

@lucylq has exported this pull request. If you are a Meta employee, you can view the originating Diff in D86433966.

[github-actions]

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[lucylq]

@pytorchbot cherry-pick --onto release/1.0 -c critical

[pytorchbot]

Cherry picking #15647

The cherry pick PR is at #15786 and it is recommended to link a critical cherry pick PR with an issue. The following tracker issues are updated:

• [v1.0.1] Release Tracker #15534 (comment)

Details for Dev Infra team

Raised by workflow job