Make sparsegpt not inherit from wanda modifier
Decouple SparseGPTModifierPyTorch from WandaPruningModifier
Fix docstrings

* Update OBCQ

* Extract GPTQ Modifier

…antization (#2294)

* Update OBCQ

* Extract GPTQ Modifier

* Update test recipes

* Update OBCQ

* Extract GPTQ Modifier

* Update test recipes

* Add config_groups support to GPTQModifier

* mask_structure preservation test (#2284)

* test

* Preserve weight sparsity if greater than threshold

* Add argument to preserve sparsity mask in SPARSEGPT

* fix case when mask is none

* Add test to check mask_structure
- initial mask structure should be preserved
b/w consecutive runs; added test to check this

* Update tensor_follows_mask_structure to check for atleast n zeros

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Co-authored-by: Sara Adkins <sara@neuralmagic.com>

* PR comments

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Co-authored-by: Sara Adkins <sara@neuralmagic.com>