Arm Backend: Add support for copy.default

[agrima1304]

Add copy.default to remove_noop_pass and add tests for copy.default

cc @freddan80 @per @zingo @oscarandersson8218 @digantdesai

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15457

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❗ 1 Active SEVs

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

• Long queue for ROCM runners, also B200 and XPU queueing is observed

❌ 1 Cancelled Job, 2 Unrelated Failures

As of commit ed4b043 with merge base d77f045 ():

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

• trunk / test-models-macos-coreml (w2l) / macos-job (gh)
  ##[error]The operation was canceled.

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

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

• trunk / unittest-release / linux / linux-job (gh) (trunk failure)
  [ FAILED ] WavLoaderTest.LoadAudioDataRejectsUnsupportedFormat
• trunk / unittest-release / macos / macos-job (gh) (trunk failure)
  [ FAILED ] WavLoaderTest.LoadAudioDataRejectsUnsupportedFormat

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[agrima1304]

CI failures unrelated.