Ensure input nodes are in correct order for bmm/matmul

[SaoirseARM]

Summary

• Ensures inputs come are processed in the correct order
• Remove flaky test decorator for test_bmm and test_mm

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/8095

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⏳ 1 Pending, 1 Unrelated Failure

As of commit c0e9a6c with merge base c9f5f19 ():

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

• trunk / test-models-macos (cmake, emformer_transcribe, xnnpack-quantization-delegation, macos-m1-stable, 90) / macos-job (gh) (matched macos rule in flaky-rules.json)
  File doesn't exist

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[SaoirseARM]

@pytorchbot label ciflow/trunk

[SaoirseARM]

@pytorchbot label 'partner: arm'

[SaoirseARM]

@pytorchbot label "topic: not user facing"

[zingo]

macos test fails unrelated