Cadence ops: Add in singleton tensor default variants

[DrJessop]

Summary:

• Cleaned up decorator so we don't need to keep asserting that outs are tensors
• Added default variants which just call per_tensor_variants.
• Test which just ensures that they all run

Differential Revision: D84842582

[pytorch-bot]

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• AWS was down, GHA infrastructure effected / recovering

❌ 7 New Failures, 2 Unrelated Failures

As of commit d818d1c with merge base d2aa141 ():

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t bafc59e2e11614d5ed13fcf9a85f202f40617b0711d53e3c3bab225e5e6547ec /exec failed with exit code 1
• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh)
  RuntimeError: Command docker exec -t c1b8115b0d5859782dce8e645be6e3be07faac69a2e01b5551098bab71f15082 /exec failed with exit code 1
• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t eaaed7cd0c3e751f2087146ea5e5ed2a6e53a882e5a0a7b8259ac275d11e06e9 /exec failed with exit code 1
• Test CUDA Builds / export-voxtral-cuda-non-quantized / linux-job (gh)
  RuntimeError: Command docker exec -t 2dac01512c750412b8c5587d659dc1d011689d5b17b1b9f241252dd544517f25 /exec failed with exit code 2
• Test CUDA Builds / export-voxtral-cuda-quantized-int4-tile-packed / linux-job (gh)
  RuntimeError: Command docker exec -t ecb9fa808426a92d28ff4f6eb9a1b80003381514775aef07607987485b61fbc3 /exec failed with exit code 2
• Test CUDA Builds / export-voxtral-cuda-quantized-int4-weight-only / linux-job (gh)
  RuntimeError: Command docker exec -t d3cb8020c2f1100bcc65023a9e2b89e10930250ea733a0f00d40368f7eabe1a7 /exec failed with exit code 2
• Test Metal Backend / export-voxtral-metal-artifact / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 2

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 / linux / linux-job (gh) (trunk failure)
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)

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[meta-codesync]

@DrJessop has exported this pull request. If you are a Meta employee, you can view the originating Diff in D84842582.

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