Gptq refactor

[xin3he]

Type of Change

feature
API changed or not: yes

Description

• Reduce additional initialization of quantizer between prepare and convert
  Before:
  
  Now:
  Reduce additional initialization of quantizer between prepare and convert
  

• Migrate GPTQ to Torch new 3x API

GPTQ

from neural_compressor.torch.quantization import get_default_gptq_config, prepare, convert
quant_config = get_default_gptq_config()
model= prepare(model, quant_config)
run_fn(model)
q_model = convert(model)

How has this PR been tested?

Pre-ci

[github-actions]

⚡ Required checks status: All passing 🟢

Groups summary

🟢 Code Scan Tests workflow

Check ID	Status	Error details
Code-Scan	success		✅
Code-Scan (Bandit Code Scan Bandit)	success		✅
Code-Scan (DocStyle Code Scan DocStyle)	success		✅
Code-Scan (Pylint Code Scan Pylint)	success		✅

These checks are required after the changes to neural_compressor/torch/algorithms/weight_only/gptq.py, neural_compressor/torch/quantization/algorithm_entry.py.

🟢 Model Tests 3x workflow

Check ID	Status	Error details
Model-Test-3x	success		✅
Model-Test-3x (Generate Report GenerateReport)	success		✅
Model-Test-3x (Run PyTorch Model opt_125m_woq_gptq_int4)	success		✅
Model-Test-3x (Run PyTorch Model opt_125m_woq_gptq_int4_dq_bnb)	success		✅
Model-Test-3x (Run PyTorch Model opt_125m_woq_gptq_int4_dq_ggml)	success		✅

These checks are required after the changes to neural_compressor/torch/algorithms/weight_only/gptq.py, neural_compressor/torch/quantization/algorithm_entry.py.

🟢 Unit Tests 3x-PyTorch workflow

Check ID	Status	Error details
UT-3x-Torch	success		✅
UT-3x-Torch (Coverage Compare CollectDatafiles)	success		✅
UT-3x-Torch (Unit Test 3x Torch Unit Test 3x Torch)	success		✅
UT-3x-Torch (Unit Test 3x Torch baseline Unit Test 3x Torch baseline)	success		✅

These checks are required after the changes to neural_compressor/torch/algorithms/weight_only/gptq.py, neural_compressor/torch/quantization/algorithm_entry.py, test/3x/torch/quantization/weight_only/test_gptq.py.

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[xin3he]

Final decision:

[yiliu30]

One more thing, suggest merging it into master directly.