Arm backend: Consolidate CI testing

[zingo]

Testing is done via test_arm_backed.sh instead of different scripts. OOBT tests in CI is part of the test matrix instead of separate job descriptions doing the same thing.
GitHub job names all start with test-arm-backend making it easier know what jobs belongs to and to filter in the HUD.

Test plan

Github testing

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

[pytorch-bot]

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❌ 1 New Failure

As of commit 76a4602 with merge base b4a9e72 ():

NEW FAILURE - The following job has failed:

• trunk / unittest-release / macos / macos-job (gh)
  extension/pybindings/test/test_pybindings.py::PybindingsTest::test_program_data_separation

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[Copilot]

Pull request overview

This PR consolidates Arm backend CI coverage by routing out-of-the-box (OOTB) notebook/e2e checks through backends/arm/test/test_arm_backend.sh, simplifying the workflow matrix and standardizing job naming.

Changes:

• Add OOTB test entrypoints to test_arm_backend.sh that delegate to test_arm_ootb.sh.
• Add a dedicated requirements file for OOTB notebook execution (notebook, nbconvert) and install it on-demand in the OOTB script.
• Update CI workflows to include OOTB tests in the Arm backend test matrices and remove the standalone OOTB CI job; rename the PR workflow Arm job.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
backends/arm/test/test_arm_ootb.sh	Adds repo-root/requirements discovery and on-demand install for notebook execution deps.
backends/arm/test/test_arm_backend.sh	Introduces new test_* entrypoints to run OOTB suites via test_arm_ootb.sh.
backends/arm/requirements-arm-ootb-test.txt	New requirements list for OOTB notebook conversion/execution.
backends/arm/README.md	Documents the newly added OOTB test entrypoints.
.github/workflows/trunk.yml	Moves OOTB coverage into the existing Arm backend test matrices; removes standalone OOTB job.
.github/workflows/pull.yml	Renames the Arm backend “no driver” job (but currently introduces a YAML syntax issue).

Comments suppressed due to low confidence (1)

backends/arm/test/test_arm_ootb.sh:40

• install_ootb_test_requirements falls back to pip install ... if the imports fail. Using bare pip can install into a different interpreter than python3 (especially in conda), which can still leave python3/jupyter missing the modules. Prefer python3 -m pip install -r "${ootb_requirements}" (and ideally check that jupyter nbconvert is available after install).

install_ootb_test_requirements() {
    python3 - <<'PY' || pip install -r "${ootb_requirements}"
import notebook  # noqa: F401
import nbconvert  # noqa: F401
PY
}

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

.github/workflows/trunk.yml:362

• PR description mentions running tests via test_arm_backed.sh, but the script used throughout the repo/workflows is test_arm_backend.sh. Consider correcting the PR description to avoid confusion for reviewers and future readers.

        bash .ci/scripts/setup-conda.sh
        eval "$(conda shell.bash hook)"