Arm backend: Add Deeplab3 test

[Erik-Lundell]

The model causes problems that we see in other models such as incorrect quantization and int64s showing up.
I plan to use the model as a case study for improving what errors we get.

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

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❌ 2 New Failures, 1 Cancelled Job

As of commit da5361e with merge base 524ec78 ():

NEW FAILURES - The following jobs have failed:

• pull / test-llava-runner-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 500e722141ac38d5a737d904a9f7e980cd561f4a994eaf105b6ebc9c5c215711 /exec failed with exit code 139
• pull / unittest / macos / macos-job (gh)
  backends/xnnpack/test/ops/test_conv1d.py::TestConv1d::test_qs8_conv1d_batchnorm_seq

CANCELLED JOB - The following job was cancelled. Please retry:

• trunk / test-apple-model / macos-job (gh)
  ##[error]The operation was canceled.

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[zingo]

MacOS and llama fails are unrelated