Add CUDA 13.2 support and drop unsupported 12.8/12.9

[Gasoonjia]

Add (13, 2) to SUPPORTED_CUDA_VERSIONS in install_utils.py and to the cuda.yml build matrix. Remove 12.8 and 12.9, which are no longer supported.

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/20440

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❗ 1 Active SEVs

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• [ROCm] MI350 CI jobs will have longer queue times due to CI migration

❌ 6 New Failures, 1 Unrelated Failure, 1 Unclassified Failure

As of commit 36444d6 with merge base 574bfca ():

NEW FAILURES - The following jobs have failed:

• pull / test-arm-backend-no-driver (test_pytest_models_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t 845bf2dafdf648f4ca78980be6bda0a680152b28952f405455afeb9d56ce38dc /exec failed with exit code 1
• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  RuntimeError: Command docker exec -t 2853082ba5e8c1acf48edf4d0df4462f25875f7265dbc7434d5fa082c08b9262 /exec failed with exit code 139
• pull / unittest / macos / macos-job (gh)
  export/tests/test_target_recipes.py::TestTargetRecipes::test_resnet50_model
• pull / unittest / windows / windows-job (gh)
  Process completed with exit code 2.
• pull / unittest-editable / windows / windows-job (gh)
  Process completed with exit code 2.
• Test CUDA Builds / check-all-cuda-builds (gh)
  Process completed with exit code 1.

UNCLASSIFIED FAILURE - DrCI could not classify the following job because the workflow did not run on the merge base. The failure may be pre-existing on trunk or introduced by this PR:

• Test CUDA Builds / test-executorch-cuda-build-13.2 / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command

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

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

• pull / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh) (trunk failure)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

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