Arm backend: Enable docformatter for vgf/tosa/ethosu

[Sebastian-Larsson]

Run docformatter in vgf, tosa, and ethosu modules.

cc @freddan80 @per @zingo @oscarandersson8218 @digantdesai

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/17154

• 📄 Preview Python docs built from this PR

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❌ 4 New Failures

As of commit 0b2585f with merge base 06a2bba ():

NEW FAILURES - The following jobs have failed:

• pull / unittest-arm-backend-with-no-deps (test_pytest_models_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t 1564c2e3c40aab4cf6bcfc15ddd77a03cc885d4343b8d2a7d1d07fde5a05a38a /exec failed with exit code 1
• pull / unittest-editable / macos / macos-job (gh)
  backends/xnnpack/test/ops/test_conv2d.py::TestConv2d::test_fp16_conv2d
• trunk / test-arm-backend-ethos-u (test_pytest_models_ethos_u55) / linux-job (gh)
  RuntimeError: Command docker exec -t b3fedb37e52120de744c5c5125ac125ea76420fc5206d51d163887de44236149 /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 6893dde5aa42b3edc0de1c14119eb38316476c220ee17088df438d401246502a /exec failed with exit code 1

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[Sebastian-Larsson]

CI failures unrelated

[zingo]

This fail on test_nss_model this is expected and unrelated, a separate fix is on it's way #17200