Add Arm & NXP usernames for excluding contributors

[nil-is-all]

Irina Korchakova - irtrukhina
Rob-Hughes-Arm

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/18503

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❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• viable/strict has been blocked for 5+ days

❌ 1 Cancelled Job, 2 Unrelated Failures

As of commit 9498655 with merge base 8f1b5ee ():

CANCELLED JOB - The following job was cancelled. Please retry:

• pull / unittest-editable / windows / windows-job (gh)

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

• pull / test-models-linux-basic (vit, xnnpack-quantization-delegation, cmake, linux.arm64.2xlarge, execut... / linux-job (gh) (matched linux rule in flaky-rules.json)
  docker: Error response from daemon: Head "https://registry-1.docker.io/v2/arm64v8/alpine/manifests/latest": received unexpected HTTP status: 500 Internal Server Error.

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

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

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

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