add cuda backend to backend test infra

[Gasoonjia]

Differential Revision: D93019490

[pytorch-bot]

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❌ 8 New Failures, 2 Cancelled Jobs, 11 Pending

As of commit 3c1bd8a with merge base c229dbc ():

NEW FAILURES - The following jobs have failed:

• Lint / lintrunner / linux-job (gh)
• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  RuntimeError: Command docker exec -t 702850fac58e9d87942d7b52fedacf41047698c41894c5c2d9b7ecaf7c1874b1 /exec failed with exit code 139
• pull / test-samsung-models-linux / linux-job (gh)
  test_inception_v3_fp16
• Test CUDA Builds / test-model-cuda-e2e (mistralai, Voxtral-Mini-3B-2507, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t 3b1921aaab000f49eaf4252285ef76465b385a01c7016de7d6b38df0a93e96d7 /exec failed with exit code 1
• Test Metal Backend / export-model-metal-artifact (openai, whisper-large-v3-turbo, non-quantized) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• 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
• trunk / test-arm-backend-ethos-u (test_pytest_ops_ethos_u55) / linux-job (gh)
  RuntimeError: Command docker exec -t 2c99b29f3008f41e6816ffb5e847901eb66e7177e39a97e5bcb6782b772d5bb7 /exec failed with exit code 1
• trunk / test-mcu-cortex-m-backend / linux-job (gh)
  RuntimeError: Command docker exec -t 246ce6f6aeeeefe39a18af09d5e2749976041b9c1e300d36075de2e90bb753ff /exec failed with exit code 1

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• Test ARM Backend / test-arm / test-backend-linux (arm_tosa_fp, models) / linux-job (gh)
  ##[error]The operation was canceled.
• Test ARM Backend / test-arm / test-backend-linux (arm_vgf_fp, models) / linux-job (gh)

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[meta-codesync]

@Gasoonjia has exported this pull request. If you are a Meta employee, you can view the originating Diff in D93019490.

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