Update highlighting model translator to adapt new model

[junqiu-lei]

Description

Update highlighting QA model to adapt new highlighter model:

• Add chunk strategy due to model max length limitation to 512 by default
• Introduced sentence_ids which is required by new model

Related Issues

opensearch-project/neural-search#1182

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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[codecov]

Codecov Report

Attention: Patch coverage is 84.23645% with 32 lines in your changes missing coverage. Please review.

Project coverage is 80.30%. Comparing base (b9d5201) to head (39114b4).

Files with missing lines	Patch %	Lines
...on_answering/SentenceHighlightingQATranslator.java	77.23%	18 Missing and 10 partials ⚠️
...hms/question_answering/QuestionAnsweringModel.java	94.73%	1 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3699      +/-   ##
============================================
+ Coverage     80.27%   80.30%   +0.02%     
- Complexity     7054     7090      +36     
============================================
  Files           621      621              
  Lines         30801    30939     +138     
  Branches       3470     3496      +26     
============================================
+ Hits          24726    24845     +119     
- Misses         4567     4579      +12     
- Partials       1508     1515       +7     

Flag	Coverage Δ
ml-commons	80.30% <84.23%> (+0.02%)	⬆️

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[mingshl]

@junqiu-lei please create new issue and add the new doc for documentation repo to introduce this new model https://github.com/opensearch-project/documentation-website

[junqiu-lei]

Great thanks @mingshl, @dhrubo-os and @akolarkunnu for the reviewing.

@junqiu-lei please create new issue and add the new doc for documentation repo to introduce this new model https://github.com/opensearch-project/documentation-website

Yes, working on it by opensearch-project/documentation-website#9583