[lint] reformat qat files

[danielvegamyhre]

Summary

• I noticed CI linter failing on some QAT related files unrelated to my PR: https://github.com/pytorch/ao/actions/runs/14581509830/job/40899042247?pr=2077
• This change reformats torchao/quantization/qat/ with ruff format so CI linter stops failing.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/ao/2090

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 1 New Failure, 4 Pending, 3 Unrelated Failures

As of commit e499a70 with merge base 4805efd ():

NEW FAILURE - The following job has failed:

• Run TorchAO Experimental Tests / test-cpu-ops (macos-14) (gh)
  torchao/experimental/tests/test_int8_dynamic_activation_intx_weight.py::TestInt8DynamicActivationIntxWeight::test_identical_to_IntXQuantizationAwareTrainingConfig_{'weight_dtype':

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

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

• Run Regression Tests / test (CPU 2.4, linux.4xlarge, torch==2.4.0 --index-url https://download.pytorch.org/whl/cpu, cpu) / linux-job (gh) (trunk failure)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2
• Run Regression Tests / test (CPU 2.5.1, linux.4xlarge, torch==2.5.1 --index-url https://download.pytorch.org/whl/cpu, cpu) / linux-job (gh) (trunk failure)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2
• Run Regression Tests / test-nightly (CPU Nightly, linux.4xlarge, --pre torch --index-url https://download.pytorch.org/wh... / linux-job (gh) (trunk failure)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2

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

[danielvegamyhre]

cc @andrewor14