[Backport 2.18] Add parser for ModelTensorOutput and ModelTensors

[opensearch-trigger-bot]

Backport 31f0422 from #3658

[mingshl]

@b4sjoo can you check at least one CI success before this merge?

A problem occurred configuring root project 'opensearch-ml'.
> Could not resolve all files for configuration ':classpath'.
   > Could not resolve org.opensearch.gradle:build-tools:2.18.0-SNAPSHOT.
     Required by:
         project :
      > Could not resolve org.opensearch.gradle:build-tools:2.18.0-SNAPSHOT.
         > Unable to load Maven meta-data from https://ci.opensearch.org/ci/dbc/snapshots/lucene/org/opensearch/gradle/build-tools/2.18.0-SNAPSHOT/maven-metadata.xml.
            > Could not GET 'https://ci.opensearch.org/ci/dbc/snapshots/lucene/org/opensearch/gradle/build-tools/2.18.0-SNAPSHOT/maven-metadata.xml'. Received status code [40](https://github.com/opensearch-project/ml-commons/actions/runs/13928883173/job/38980729793?pr=3628#step:5:41)3 from server: Forbidden