Refactor Quantize

[FusionBolt]

1. remove unused evaluate in GetHistogramsAsync
2. clear unused memory in GetRangesAsync
3. speed up SQuant

[github-actions]

Test Results

5 859 tests  ±0   5 859 ✔️ ±0   8m 8s ⏱️ +42s
       6 suites ±0          0 💤 ±0 
       6 files   ±0          0 ❌ ±0 

Results for commit bfbb9ed. ± Comparison against base commit 3a53346.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (3a53346) 73.18% compared to head (bfbb9ed) 73.16%.

Files	Patch %	Lines
...c/Nncase.Quantization/Quantization/QuantUtility.cs	96.51%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1144      +/-   ##
==========================================
- Coverage   73.18%   73.16%   -0.02%     
==========================================
  Files         706      706              
  Lines       25827    25818       -9     
  Branches     4212     4203       -9     
==========================================
- Hits        18901    18890      -11     
- Misses       6285     6286       +1     
- Partials      641      642       +1     

Flag	Coverage Δ
integration	39.11% <0.99%> (+0.01%)	⬆️
unit	65.02% <97.02%> (-0.02%)	⬇️

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