Test unwrap tensor subclass

[metascroy]

No description provided.

[pytorch-bot]

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• Rolling out OSDC (ARC) runners on pull & trunk workflows in PyTorch main

✅ You can merge normally! (3 Unrelated Failures)

As of commit 1df5d56 with merge base 7b5dcc1 ():

BROKEN TRUNK - The following jobs failed but were 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.
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• Test Metal Backend / test-metal-qwen35-moe-tiny / macos-job (gh) (trunk failure)
  /Users/ec2-user/runner/_work/executorch/executorch/pytorch/executorch/examples/models/qwen3_5_moe/main.cpp:300:3: error: use of undeclared identifier 'cudaMemGetInfo'

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[metascroy]

cc @mergennachin

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