Arm backend: Fix remaining docformatter issues in operator_support

[Sebastian-Larsson]

cc @freddan80 @per @zingo @oscarandersson8218 @digantdesai

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/17274

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❌ 5 New Failures, 4 Pending, 3 Unrelated Failures

As of commit b3534e0 with merge base 641efda ():

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t ab1dd0b894789233b2ec172e21476b83a29156200447a14e239c829de0091523 /exec failed with exit code 1
• pull / test-samsung-quantmodels-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 3ba524f1dffc6d7a71c464fcb6af0a2fa8ac987615173e6fcb830dacf6868d34 /exec failed with exit code 1
• pull / unittest / linux / linux-job (gh)
  RuntimeError: Command docker exec -t fa41b9c7748df2be5b64ba9657f1bfd125fa5c698e00a2b1bad3f23ae8daa1dc /exec failed with exit code 1
• pull / unittest-editable / linux / linux-job (gh)
  RuntimeError: Command docker exec -t d5e6991db6e1813f9195903f7dfd0affaba90be65578cf742540027e9433b296 /exec failed with exit code 1
• trunk / unittest-release / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 8edee74d9c1a0e877ba547b1dee8e409f083147cc22250010b9041cabd919c4c /exec failed with exit code 1

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

• pull / unittest / macos / macos-job (gh) (similar failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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-editable / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / unittest-release / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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[Sebastian-Larsson]

CI failures unrelated