Arm backend: Use .module() in minimal examples

[Erik-Lundell]

.graph_module doesn't work for models with weights. Also set check_guards=False, guards don't work well with et. This is addressed in et in a rather hacky way, see https://github.com/pytorch/pytorch/blob/19d8ad08cd8c6ee15c34117daaaea04d929778e4/torch/export/_unlift.py#L734

cc @freddan80 @per @zingo @oscarandersson8218 @digantdesai

[pytorch-bot]

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❌ 5 New Failures, 1 Unrelated Failure

As of commit 4846f65 with merge base a0ba28e ():

NEW FAILURES - The following jobs have failed:

• pull / android / run-emulator (gh)
  The process '/usr/bin/sh' failed with exit code 1
• pull / test-coreml-bc-macos (macos-m1-stable) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / test-coreml-bc-macos (macos-m2-stable) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh)
  RuntimeError: Command docker exec -t c53d0370c49faf6c5f48e2db05f2e7446bf4aebc46fb5ededc4fcd097f1caec1 /exec failed with exit code 1
• trunk / test-qnn-optimum-model (fp32, roberta) / linux-job (gh)
  RuntimeError: Command docker exec -t 5a2a49f9b204e810d0c5f2ca200424da110495a2a5f1f6bc67ae3abc90ff0749 /exec failed with exit code 1

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

• trunk / test-multimodal-macos (gemma3-4b) / macos-job (gh) (detected as infra flaky with no log or failing log classifier)

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[zingo]

OK to merge!