Implement predict method and add unit tests

[Yerzhaisang]

Description

• Implemented the predict method in MLCommonClient.
• Added unit tests to ensure the correctness of the predict method's behavior.
• Integrated the method with the existing system and ensured it handles the parameters (text_docs, return_number, target_response) as expected.

Issues Resolved

#287

Check List

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

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[dhrubo-os]

We have a method generate_model_inference, which is in fact the predict functionality. We can just invoke this method here?

We could change the method name generate_model_inference to predict, but for backward compatibility keep the method as it is.

[Yerzhaisang]

generate_model_inference and predict methods are not the same because:

1. URLs are not the same
2. generate_model_inference doesn't use algorithm_name

[dhrubo-os]

For model prediction, we don't need algorithm_name. code ref

[Yerzhaisang]

could you please take a look at the issue description?

[Yerzhaisang]

I see, @dhrubo-os thank you for the feedback!

[b4sjoo]

So aren't we going to remove the algorithm_name here?

[dhrubo-os]

Good point. I think it's better to keep this as a optional parameter for the BWC as before we needed to have algorithm_name for model prediction.

@Yerzhaisang currently algorithm_name isn't optional here. Can we do something like def predict(self, model_id: str, predict_object: dict, algorithm_name: str = None) -> dict: ?

[Yerzhaisang]

done

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 89.94%. Comparing base (529ee34) to head (eeffa36).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
opensearch_py_ml/ml_commons/ml_commons_client.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #425      +/-   ##
==========================================
- Coverage   91.53%   89.94%   -1.59%     
==========================================
  Files          42       43       +1     
  Lines        4395     4556     +161     
==========================================
+ Hits         4023     4098      +75     
- Misses        372      458      +86     

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[dhrubo-os]

codecov/patch — 33.33% of diff hit (target 91.53%)

@Yerzhaisang could you please take a look?

[Yerzhaisang]

@dhrubo-os it's ready for overview