NXP backend: Extend unittest-nxp-neutron job timeout to 120 minutes.

[MartinPavella]

Summary

This is a temporary fix to enable our workflow. A propper fix (test parallelism) is currently being worked on.

Test plan

N/A

cc @robert-kalmar @JakeStevens @digantdesai @rascani

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/20332

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❌ 4 New Failures, 1 Unrelated Failure

As of commit e0b4af4 with merge base c37b6c3 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / hifi-build / hifi4 (gh)
  Input required and not supplied: aws-region
• Cadence Build & Test / vision-build / vision (gh)
  Input required and not supplied: aws-region
• pull / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh)
  RuntimeError: Command docker exec -t e85b776e9c0e5c6681185a23c746b4b8ca18cf68b8e483554ec1d5bac6621638 /exec failed with exit code 137
• pull / test-voxtral-realtime-xnnpack-linux / linux-job (gh)
  RuntimeError: Command docker exec -t a0cc09a5ff521cf221bdaee80b5abcf78161198ea3b0dbe93d4cfd2aa7b26af9 /exec failed with exit code 1

BROKEN TRUNK - The following job failed but were present on the merge base:

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

• pull / test-arm-backend-no-driver (test_pytest_models_tosa) / linux-job (gh) (trunk failure)
  The runner has received a shutdown signal. This can happen when the runner service is stopped, or a manually started runner is canceled.

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[linux-foundation-easycla]

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[MartinPavella]

The failing checks seem unrelated and the internal CI is irrelevant. Merging.