Arm backend: Add VIT test

[oscarandersson8218]

Adds unittest for VIT model.

Change-Id: Icb1923a9b2cc4740ceff0d4daccba1d12ead6e5f

cc @digantdesai @freddan80 @per @zingo

[pytorch-bot]

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❌ 6 New Failures

As of commit d250630 with merge base 2aa8084 ():

NEW FAILURES - The following jobs have failed:

• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh)
  RuntimeError: Command docker exec -t 68d5581fcb8eef1f8e058fd5990dc7bcc72469136c5ac756ad1788aa8a43d944 /exec failed with exit code 2
• pull / unittest-arm-backend-with-no-fvp (test_pytest_ops) / linux-job (gh)
  RuntimeError: Command docker exec -t 88a7929934d22431ba95d3f5284abdda422c2a312c83b52038a525fa0a16a0e1 /exec failed with exit code 1
• pull / unittest-editable / macos / macos-job (gh)
  backends/xnnpack/test/ops/test_conv1d.py::TestConv1d::test_qs8_conv1d_batchnorm_seq
• trunk / test-arm-backend (test_pytest_models_ethosu_fvp) / linux-job (gh)
  RuntimeError: Command docker exec -t d2e45b212ada36f59cccbd704f17cc7f34f07cc0814a59feb338afc26bd3bda3 /exec failed with exit code 2
• trunk / test-arm-backend (test_pytest_ops_ethosu_fvp) / linux-job (gh)
  RuntimeError: Command docker exec -t f0f14c27554da90d22f5427d72a22649227f29bae3de0805b9832e39e5b67e4f /exec failed with exit code 1
• trunk / test-arm-cortex-m-size-test (bare_metal) / linux-job (gh)
  RuntimeError: Command docker exec -t 03b2f3b3be9db8538094a35f78f728146f63478ee22b0a9de59b3fc8b7d2f3cf /exec failed with exit code 1

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[digantdesai]

❤️

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[oscarandersson8218]

Model is not suitable for testing test/models as it's too big. Closing this.