[ET-VK][ez] Add support for auto_functionalized_v2

[SS-JIA]

Summary:
Update the Vulkan partitioner to recognize torch.ops.higher_order.auto_functionalized_v2
in addition to the existing auto_functionalized op when determining operator support
and extracting target names for custom operators.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16790

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❌ 1 New Failure, 1 Cancelled Job, 18 Pending

As of commit 1c8e3f1 with merge base 86b4bea ():

NEW FAILURE - The following job has failed:

• Test Metal Backend / export-model-metal-artifact (openai, whisper-small, non-quantized) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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

• pull (gh)

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[SS-JIA]

Fixes #16647

[github-actions]

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[SS-JIA]

@pytorchbot cherry-pick --onto release/1.1 -c critical

[pytorchbot]

Cherry picking #16790

The cherry pick PR is at #16794 and it is recommended to link a critical cherry pick PR with an issue.

Details for Dev Infra team

Raised by workflow job