Enable gemlite copy_ and fix slice

[jerryzh168]

Summary:
att, the goal is to run phi4-gemlite checkpoint with vllm: https://huggingface.co/jerryzh168/phi4-mini-int4wo-gemlite

Test Plan:
python test/dtypes/test_affine_quantized.py -k test_slice_gemlite

Reviewers:

Subscribers:

Tasks:

Tags:

[pytorch-bot]

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❌ 7 New Failures

As of commit e23ec91 with merge base 7fa9c69 ():

NEW FAILURES - The following jobs have failed:

• Code Analysis with Ruff / build (3.9) (gh)
  Process completed with exit code 1.
• 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)
  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)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2
• Run Regression Tests / test (CUDA 2.4, linux.g5.12xlarge.nvidia.gpu, torch==2.4.0, cuda, 12.1) / linux-job (gh)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2
• Run Regression Tests / test (CUDA 2.5.1, linux.g5.12xlarge.nvidia.gpu, torch==2.5.1 --index-url https://download.pytorch... / linux-job (gh)
  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)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2
• Run Regression Tests / test-nightly (CUDA Nightly, linux.g5.12xlarge.nvidia.gpu, --pre torch --index-url https://downloa... / linux-job (gh)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2

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[jerryzh168]

fix carried on in #2096