[Backport to main] update connector API

[rbhavna]

Description

Backport 1227 to main

Issues Resolved

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

Attention: 101 lines in your changes are missing coverage. Please review.

Comparison is base (568bc7e) 79.42% compared to head (d73e3e5) 79.65%.
Report is 3 commits behind head on main.

Files	Patch %	Lines
...rithms/metrics_correlation/MetricsCorrelation.java	0.00%	46 Missing ⚠️
...pensearch/ml/engine/algorithms/DLModelExecute.java	0.00%	10 Missing ⚠️
.../ml/engine/algorithms/clustering/RCFSummarize.java	78.94%	7 Missing and 1 partial ⚠️
...ain/java/org/opensearch/ml/engine/ModelHelper.java	78.26%	4 Missing and 1 partial ⚠️
..._embedding/HuggingfaceTextEmbeddingTranslator.java	33.33%	4 Missing ⚠️
...gine/algorithms/tokenize/SparseTokenizerModel.java	78.57%	2 Missing and 1 partial ⚠️
...n/transport/connector/MLUpdateConnectorAction.java	0.00%	2 Missing ⚠️
...l/engine/algorithms/ad/AnomalyDetectionLibSVM.java	87.50%	0 Missing and 2 partials ⚠️
...thms/anomalylocalization/AnomalyLocalizerImpl.java	96.66%	0 Missing and 2 partials ⚠️
...rics_correlation/MetricsCorrelationTranslator.java	0.00%	2 Missing ⚠️
... and 14 more

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1651      +/-   ##
============================================
+ Coverage     79.42%   79.65%   +0.23%     
- Complexity     3982     4017      +35     
============================================
  Files           390      394       +4     
  Lines         16215    16385     +170     
  Branches       1751     1754       +3     
============================================
+ Hits          12879    13052     +173     
+ Misses         2661     2657       -4     
- Partials        675      676       +1     

Flag	Coverage Δ
ml-commons	79.65% <83.46%> (+0.23%)	⬆️

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