Arm backend: Add support for detach_copy

[bdemirb]

cc @freddan80 @per @zingo @oscarandersson8218 @digantdesai

[pytorch-bot]

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❌ 1 Awaiting Approval, 8 New Failures, 18 Pending, 1 Unrelated Failure

As of commit 5a1ab2b with merge base a093fe4 ():

AWAITING APPROVAL - The following workflow needs approval before CI can run:

• periodic (gh)

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t f217d223fa40e761987fee0b891c7aa638700e58433bba0d0e8dd2f647b42e70 /exec failed with exit code 1
• pull / test-samsung-quantmodels-linux / linux-job (gh)
  RuntimeError: Command docker exec -t d2f0962fbdca754e75435f74d3c2f3c456b41ea5321e1b4f3cf8f39210362803 /exec failed with exit code 1
• pull / unittest-arm-backend-with-no-deps (test_pytest_models_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t c924553219393a3ad7913b72013094308b2fe55c2d4be003538261c8e8aecc32 /exec failed with exit code 1
• Test CUDA Builds / check-all-cuda-builds (gh)
  Process completed with exit code 1.
• Test CUDA Builds / test-executorch-cuda-build-13.0 / linux-job (gh)
  RuntimeError: Command docker exec -t cc21bd88b1cd0f24d0d27d1bffa608d4848050b4e9a065d269f48760510f850d /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_model_smollm2-135M) / linux-job (gh)
  RuntimeError: Command docker exec -t eae3e4338f5c492fb68b6d7eda3cb9655c23a966a9b889849852d2ab860a61f1 /exec failed with exit code 2
• trunk / test-arm-backend-ethos-u (test_pytest_models_ethos_u55) / linux-job (gh)
  RuntimeError: Command docker exec -t f7d621e01b20ed322a8f0ecd9f61577391145342345088ce9b2ad6d0098e9734 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_pytest_models_ethos_u85) / linux-job (gh)
  RuntimeError: Command docker exec -t 841efd59330cf435d33d3eb7a56fdbdd0ea56e115d7bc6b09715e90374bc536f /exec failed with exit code 1

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

• pull / unittest-buck / linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

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[bdemirb]

@pytorchbot label ciflow/trunk

[pytorch-bot]

To add these label(s) (ciflow/trunk) to the PR, please first approve the workflows that are awaiting approval (scroll to the bottom of this page).

This helps ensure we don't trigger CI on this PR until it is actually authorized to do so. Please ping one of the reviewers if you do not have access to approve and run workflows.

[pytorch-bot]

To add the ciflow label ciflow/trunk please first approve the workflows that are awaiting approval (scroll to the bottom of this page).

This helps ensure we don't trigger CI on this PR until it is actually authorized to do so. Please ping one of the reviewers if you do not have access to approve and run workflows.

[bdemirb]

@pytorchbot label "release notes: arm"