[timeseries] Change the implementation of negativebinomial function to the pytorch version

[Carkham]

Description

Change the implementation of negativebinomial to the pytorch version

[codecov-commenter]

Codecov Report

Base: 72.08% // Head: 67.85% // Decreases project coverage by -4.23% :warning:

Coverage data is based on head (43ffbc1) compared to base (bb5073f). Patch coverage: 68.20% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2030      +/-   ##
============================================
- Coverage     72.08%   67.85%   -4.24%     
- Complexity     5126     5956     +830     
============================================
  Files           473      612     +139     
  Lines         21970    27173    +5203     
  Branches       2351     2942     +591     
============================================
+ Hits          15838    18438    +2600     
- Misses         4925     7349    +2424     
- Partials       1207     1386     +179     

Impacted Files	Coverage Δ
api/src/main/java/ai/djl/modality/cv/Image.java	69.23% <ø> (-4.11%)	:arrow_down:
...rc/main/java/ai/djl/modality/cv/MultiBoxPrior.java	76.00% <ø> (ø)
...rc/main/java/ai/djl/modality/cv/output/Joints.java	71.42% <ø> (ø)
.../main/java/ai/djl/modality/cv/output/Landmark.java	100.00% <ø> (ø)
...main/java/ai/djl/modality/cv/output/Rectangle.java	72.41% <0.00%> (ø)
...i/djl/modality/cv/translator/BigGANTranslator.java	21.42% <0.00%> (-5.24%)	:arrow_down:
...odality/cv/translator/BigGANTranslatorFactory.java	33.33% <0.00%> (+8.33%)	:arrow_up:
.../cv/translator/InstanceSegmentationTranslator.java	0.00% <0.00%> (-86.59%)	:arrow_down:
...nslator/InstanceSegmentationTranslatorFactory.java	7.14% <0.00%> (-11.04%)	:arrow_down:
.../cv/translator/SemanticSegmentationTranslator.java	0.00% <0.00%> (ø)
... and 525 more

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[frankfliu]

Do we still need this PR? Looks like this has been included in previous one.

[Carkham]

Do we still need this PR? Looks like this has been included in previous one.

Thanks, I will close these prs