[WIP]Add Int4XPUTensorIntZP

[liangan1]

This PR is used to enable the Int4XPUTensorIntZP. The pacing format name is "int4_xpu_int_zp"

ToDo: Eager mode works but there is a torch.compile issue need to be fixed.

Testcase:
bash python test/quantization/quantize_/workflows/int4/test_int4_xpu.py

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/ao/2845

• 📄 Preview Python docs built from this PR

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

❌ 8 New Failures

As of commit 1dc5b2c with merge base af2cf1e ():

NEW FAILURES - The following jobs have failed:

• Code Analysis with Ruff / build (3.9) (gh)
  torchao/quantization/quantize_/workflows/int4/int4_xpu_tensor.py:22:5: F822 Undefined name Int4TinyGemmCpuTensorinall``
• PR Label Check / Check PR Labels (gh)
  Process completed with exit code 1.
• Run 1xH100 Tests / test (H100, linux.aws.h100, --pre torch torchvision torchaudio fbgemm-gpu-genai --index-url https... / linux-job (gh)
  test/dtypes/test_affine_quantized_float.py::TestAffineQuantizedFloat8Compile::test_expected_kernels_on_gpu_granularity1_float8_config_version_2
• Run Regression Tests / test (CPU 2.8, linux.4xlarge, torch==2.8.0 --index-url https://download.pytorch.org/whl/cpu, cpu) / linux-job (gh)
  test/quantization/quantize_/workflows/int4/test_int4_xpu.py::Int4XPUTensorIntZP::test_module_path_float16
• Run Regression Tests / test (CUDA 2.8, linux.g5.12xlarge.nvidia.gpu, torch==2.8.0, cuda, 12.6) / linux-job (gh)
  test/quantization/quantize_/workflows/int4/test_int4_xpu.py::Int4XPUTensorIntZP::test_module_path_float16
• Run Regression Tests / test-nightly (CPU Nightly, linux.4xlarge, --pre torch --index-url https://download.pytorch.org/wh... / linux-job (gh)
  test/quantization/quantize_/workflows/int4/test_int4_xpu.py::Int4XPUTensorIntZP::test_module_path_float16
• Run Regression Tests / test-nightly (CUDA Nightly, linux.g5.12xlarge.nvidia.gpu, --pre torch --index-url https://downloa... / linux-job (gh)
  test/quantization/quantize_/workflows/int4/test_int4_xpu.py::Int4XPUTensorIntZP::test_module_path_float16
• Run TorchAO Experimental Tests / test-cpu-ops (linux.arm64.2xlarge) (gh)
  /home/ec2-user/actions-runner/_work/ao/ao/torchao/experimental/../../torchao/experimental/ops/embedding_lut/op_embedding_groupwise_lowbit_lut-impl.h:227:50: error: ‘packed_embedding_size’ is not a member of ‘torchao::kernels::cpu::aarch64::embedding’

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