add local hessian calibration

[Fridah-nv]

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[realAsma]

overall looks great, have you run any experiments with this?

[Fridah-nv]

overall looks great, have you run any experiments with this?

I'm still get the numbers, will update here when it's ready

[codecov]

Codecov Report

❌ Patch coverage is 15.97222% with 121 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.89%. Comparing base (aafd388) to head (4d1380a).

Files with missing lines	Patch %	Lines
modelopt/torch/quantization/model_calib.py	3.20%	121 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #788      +/-   ##
==========================================
- Coverage   73.31%   72.89%   -0.43%     
==========================================
  Files         192      192              
  Lines       19613    19755     +142     
==========================================
+ Hits        14380    14401      +21     
- Misses       5233     5354     +121     

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