Arm backend: Enable CPPCHECK linting

[perheld]

Bump lintrunner-adapters to 0.14.0 which supports cppcheck and start linting the arm backend.

Change-Id: I1b28466d7f78d006a38b8d3c711670991cbc327a

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218 @mansnils @Sebastian-Larsson @robell @rascani

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19509

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Run pull jobs on OSDC in pull requests shadow mode

❌ 5 New Failures, 6 Unrelated Failures

As of commit f78454c with merge base f1062a7 ():

NEW FAILURES - The following jobs have failed:

• pull / android / run-emulator (gh)
  The process '/usr/bin/sh' failed with exit code 1
• pull / unittest-editable / linux / linux-job (gh)
  exir/tests/test_memory_planning.py::TestMisc::test_multiple_pools_1
• trunk / test-huggingface-transformers-xnnpack (gemma3-1b|xnnpack|--quantize) / linux-job (gh)
  RuntimeError: Command docker exec -t ec28bda7ea75ffe12928efa9d163964b78c83f8a36b6e841d5c937e2612788a2 /exec failed with exit code 134
• trunk / unittest-release / linux / linux-job (gh)
  exir/tests/test_memory_planning.py::TestMisc::test_multiple_pools_1
• trunk / unittest-release / macos / macos-job (gh)
  export/tests/test_target_recipes.py::TestTargetRecipes::test_mv2_model

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

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

• pull / unittest / linux / linux-job (gh) (trunk failure)
  exir/tests/test_joint_graph.py::TestJointGraph::test_joint_graph
• pull / unittest / macos / macos-job (gh) (trunk failure)
  exir/tests/test_joint_graph.py::TestJointGraph::test_joint_graph
• pull / unittest / windows / windows-job (gh) (trunk failure)
  exir/tests/test_joint_graph.py::TestJointGraph::test_joint_graph
• pull / unittest-editable / macos / macos-job (gh) (trunk failure)
  exir/tests/test_joint_graph.py::TestJointGraph::test_joint_graph
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  exir/tests/test_joint_graph.py::TestJointGraph::test_joint_graph
• trunk / unittest-release / windows / windows-job (gh) (trunk failure)
  exir/tests/test_joint_graph.py::TestJointGraph::test_joint_graph

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

[perheld]

After this patch I have a bunch that fixes and enables more directories.

[Copilot]

Pull request overview

Enables CPPCHECK linting for the Arm backend by adding a new lintrunner linter configuration and updating the lintrunner-adapters version to one that supports cppcheck.

Changes:

• Bump lintrunner-adapters to 0.14.0.
• Add CPPCHECK linter configuration targeting Arm backend/example C++ sources.
• Add cppcheck (and dependency defusedxml) to the lintrunner requirements set.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
requirements-lintrunner.txt	Adds cppcheck and a dependency to the linter-only requirements so lintrunner can install them.
requirements-dev.txt	Updates lintrunner-adapters pin to a version that supports cppcheck.
.lintrunner.toml	Introduces a new CPPCHECK linter entry to lint Arm backend/example C++ sources.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[zingo]

Hi @digantdesai this one is a bit outside Arm stuff and we think it might need a Meta look.