Move MacOS jobs (phi-4-mini, qwen2_5) etc to Arm64

[mergennachin]

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[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/9254

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❌ 1 New Failure, 31 Pending, 1 Unrelated Failure

As of commit cb24d05 with merge base 699ee7d ():

NEW FAILURE - The following job has failed:

• Lint / lintrunner / linux-job (gh)
  >>> Lint for extension/apple/ExecutorchRuntimeBridge/ExecutorchRuntimeBridge/Exported/ExecutorchRuntimeEngine.h:

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

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

• trunk / test-arm-backend-delegation / linux-job (gh) (trunk failure)

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[jackzhxng]

If no ooming on ciflow/trunk then 👍🏻