Arm backend: Reorder BN-fusing and decomposition

[oscarandersson8218]

Make sure BN-fusing pass is run before decomposition pass.

cc @digantdesai @freddan80 @per @zingo @mansnils @Sebastian-Larsson @robell

[pytorch-bot]

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❌ 3 New Failures, 3 Cancelled Jobs, 3 Unrelated Failures

As of commit 08e7a62 with merge base a6ee309 ():

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 c32c771d63203223e85dcc5272a15dc8d6b34d56babe5efa3bfcf40b0ea160be /exec failed with exit code 1
• pull / unittest-arm-backend-with-no-deps (test_pytest_ops_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t 0d42713ba951ee7214f7149dd823c8cda82799f5e3ac5533535afda825971770 /exec failed with exit code 1
• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t a59aace596bc52c0ec3a5455303dcaf822af916efd114d71b447d44b5721dbb6 /exec failed with exit code 1

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• Check Labels (gh)
• periodic (gh)
• trunk / test-models-macos-cpu (llama2, xnnpack-quantization-delegation) / macos-job (gh)
  ##[error]The operation was canceled.

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

• pull / unittest / macos / macos-job (gh) (detected as infra flaky with no log or failing log classifier)

BROKEN TRUNK - The following jobs failed but was present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest-editable / macos / macos-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• trunk / unittest-release / macos / macos-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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